diff --git a/libsrc/meshing/improve3.cpp b/libsrc/meshing/improve3.cpp
index 32f08103..80e60545 100644
--- a/libsrc/meshing/improve3.cpp
+++ b/libsrc/meshing/improve3.cpp
@@ -2725,7 +2725,7 @@ void MeshOptimize3d :: SwapImprove (Mesh & mesh, OPTIMIZEGOAL goal,
         for (ElementIndex eli : myrange)
           {
             const auto & el = mesh[eli];
-            if(el.flags.fixed || el.IsDeleted())
+            if(el.flags.fixed)
               continue;
 
             for (auto pi : el.PNums())
@@ -2828,8 +2828,7 @@ void MeshOptimize3d :: SwapImprove (Mesh & mesh, OPTIMIZEGOAL goal,
 
       mesh.DeleteBoundaryEdges();
   }
-  else
-      mesh.Compress ();
+  mesh.Compress ();
 
   multithread.task = savetask;
 }
diff --git a/libsrc/meshing/meshclass.cpp b/libsrc/meshing/meshclass.cpp
index 1df22c89..c3a32e64 100644
--- a/libsrc/meshing/meshclass.cpp
+++ b/libsrc/meshing/meshclass.cpp
@@ -2140,8 +2140,6 @@ namespace netgen
            [&](auto & table, ElementIndex ei)
            {
              const Element & el = (*this)[ei];
-             if(el.IsDeleted())
-               return;
              if (dom == 0 || dom == el.GetIndex())
                {
                  if (el.GetNP() == 4)
diff --git a/tests/pytest/results.json b/tests/pytest/results.json
index 2f6648ec..8c8b0139 100644
--- a/tests/pytest/results.json
+++ b/tests/pytest/results.json
@@ -1453,9 +1453,9 @@
             ],
             "ne1d": 10108,
             "ne2d": 29958,
-            "ne3d": 152530,
-            "quality_histogram": "[0, 3, 1, 3, 6, 14, 58, 146, 470, 1207, 2727, 5671, 10179, 16179, 21787, 25946, 26803, 22852, 14596, 3882]",
-            "total_badness": 201507.49618
+            "ne3d": 152534,
+            "quality_histogram": "[0, 3, 1, 3, 6, 14, 58, 147, 466, 1206, 2715, 5679, 10184, 16198, 21769, 25949, 26794, 22865, 14592, 3885]",
+            "total_badness": 201509.42542
         },
         {
             "angles_tet": [
@@ -1483,9 +1483,9 @@
             ],
             "ne1d": 9622,
             "ne2d": 23596,
-            "ne3d": 80226,
-            "quality_histogram": "[2, 15, 4, 15, 17, 34, 88, 193, 428, 989, 2149, 4200, 7164, 10324, 12459, 13488, 12327, 9360, 5530, 1440]",
-            "total_badness": 110249.40023
+            "ne3d": 80222,
+            "quality_histogram": "[2, 15, 4, 17, 17, 35, 89, 194, 426, 984, 2152, 4199, 7155, 10324, 12467, 13496, 12313, 9367, 5529, 1437]",
+            "total_badness": 110253.4299
         }
     ],
     "hinge.stl": [
@@ -1517,7 +1517,7 @@
             "ne2d": 610,
             "ne3d": 778,
             "quality_histogram": "[0, 0, 2, 10, 9, 8, 23, 16, 37, 43, 67, 80, 99, 93, 80, 82, 48, 50, 27, 4]",
-            "total_badness": 1361.2707697
+            "total_badness": 1361.2707696
         },
         {
             "angles_tet": [
@@ -1556,7 +1556,7 @@
             ],
             "angles_trig": [
                 23.111,
-                129.16
+                130.19
             ],
             "ne1d": 722,
             "ne2d": 2856,
@@ -2086,7 +2086,7 @@
             "ne2d": 6832,
             "ne3d": 82638,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 4, 17, 95, 389, 1384, 3560, 7554, 12625, 17561, 19497, 15113, 4838]",
-            "total_badness": 99948.684701
+            "total_badness": 99948.684705
         }
     ],
     "period.geo": [
@@ -2193,9 +2193,9 @@
             ],
             "ne1d": 886,
             "ne2d": 2528,
-            "ne3d": 8233,
-            "quality_histogram": "[5, 8, 28, 42, 46, 55, 42, 60, 85, 121, 254, 406, 631, 878, 1224, 1258, 1262, 1075, 591, 162]",
-            "total_badness": 12214.411217
+            "ne3d": 8238,
+            "quality_histogram": "[5, 8, 28, 42, 46, 54, 44, 60, 87, 123, 252, 414, 633, 875, 1235, 1255, 1253, 1065, 604, 155]",
+            "total_badness": 12230.270782
         },
         {
             "angles_tet": [
@@ -2204,18 +2204,18 @@
             ],
             "angles_trig": [
                 4.4862,
-                146.57
+                148.52
             ],
             "ne1d": 570,
             "ne2d": 1126,
-            "ne3d": 1560,
-            "quality_histogram": "[4, 30, 43, 50, 54, 65, 89, 111, 114, 142, 156, 125, 134, 135, 110, 67, 67, 44, 18, 2]",
-            "total_badness": 4083.0633835
+            "ne3d": 1592,
+            "quality_histogram": "[4, 27, 41, 49, 62, 73, 91, 112, 117, 142, 162, 129, 138, 140, 114, 71, 61, 42, 16, 1]",
+            "total_badness": 4125.4080636
         },
         {
             "angles_tet": [
                 1.1,
-                172.08
+                172.16
             ],
             "angles_trig": [
                 3.728,
@@ -2223,9 +2223,9 @@
             ],
             "ne1d": 724,
             "ne2d": 1662,
-            "ne3d": 3108,
-            "quality_histogram": "[2, 13, 30, 52, 52, 36, 53, 70, 99, 123, 219, 240, 324, 383, 398, 378, 312, 192, 113, 19]",
-            "total_badness": 5664.2245457
+            "ne3d": 3117,
+            "quality_histogram": "[2, 12, 30, 54, 56, 40, 51, 70, 98, 128, 217, 263, 320, 383, 400, 362, 301, 205, 108, 17]",
+            "total_badness": 5701.3001361
         },
         {
             "angles_tet": [
@@ -2238,9 +2238,9 @@
             ],
             "ne1d": 956,
             "ne2d": 2742,
-            "ne3d": 8643,
-            "quality_histogram": "[3, 10, 40, 47, 44, 55, 53, 56, 90, 128, 183, 319, 518, 776, 1137, 1419, 1513, 1295, 751, 206]",
-            "total_badness": 12613.728842
+            "ne3d": 8642,
+            "quality_histogram": "[3, 11, 40, 45, 45, 55, 54, 56, 84, 135, 185, 320, 518, 792, 1121, 1438, 1493, 1311, 732, 204]",
+            "total_badness": 12619.116865
         },
         {
             "angles_tet": [
@@ -2253,9 +2253,9 @@
             ],
             "ne1d": 1554,
             "ne2d": 6276,
-            "ne3d": 30120,
-            "quality_histogram": "[2, 8, 13, 7, 28, 48, 56, 68, 92, 152, 307, 624, 1232, 2258, 3664, 5150, 5912, 5613, 3776, 1110]",
-            "total_badness": 38996.524352
+            "ne3d": 30127,
+            "quality_histogram": "[2, 8, 13, 7, 28, 46, 56, 65, 99, 149, 301, 625, 1226, 2243, 3685, 5125, 5942, 5591, 3816, 1100]",
+            "total_badness": 38992.330542
         },
         {
             "angles_tet": [
@@ -2268,9 +2268,9 @@
             ],
             "ne1d": 2992,
             "ne2d": 23260,
-            "ne3d": 281956,
-            "quality_histogram": "[4, 10, 11, 10, 10, 23, 27, 58, 101, 248, 736, 2043, 5573, 13773, 27905, 44806, 59154, 64199, 48322, 14943]",
-            "total_badness": 344631.48043
+            "ne3d": 282006,
+            "quality_histogram": "[4, 10, 11, 10, 10, 24, 27, 58, 103, 256, 737, 2052, 5583, 13827, 27949, 44817, 59126, 64139, 48326, 14937]",
+            "total_badness": 344740.46205
         }
     ],
     "revolution.geo": [
@@ -2599,93 +2599,93 @@
     "sphere.geo": [
         {
             "angles_tet": [
-                9.7311,
-                168.24
+                42.043,
+                88.484
             ],
             "angles_trig": [
-                10.368,
-                153.96
+                20.502,
+                79.749
             ],
             "ne1d": 0,
             "ne2d": 124,
-            "ne3d": 118,
-            "quality_histogram": "[0, 0, 2, 28, 72, 15, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]",
-            "total_badness": 549.67143776
+            "ne3d": 124,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 4, 26, 49, 28, 11, 4, 0, 2, 0, 0, 0, 0]",
+            "total_badness": 231.6979717
         },
         {
             "angles_tet": [
-                16.357,
-                160.14
+                46.583,
+                91.583
             ],
             "angles_trig": [
-                17.738,
-                141.22
+                31.308,
+                74.346
             ],
             "ne1d": 0,
             "ne2d": 56,
-            "ne3d": 50,
-            "quality_histogram": "[0, 0, 0, 0, 1, 2, 19, 17, 10, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]",
-            "total_badness": 141.03421685
+            "ne3d": 56,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 18, 19, 15, 0, 0]",
+            "total_badness": 68.826138928
         },
         {
             "angles_tet": [
-                13.631,
-                163.82
+                42.168,
+                87.886
             ],
             "angles_trig": [
-                14.237,
-                145.42
+                28.464,
+                75.768
             ],
             "ne1d": 0,
             "ne2d": 70,
-            "ne3d": 64,
-            "quality_histogram": "[0, 0, 0, 1, 2, 14, 36, 9, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]",
-            "total_badness": 206.35254305
+            "ne3d": 70,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 11, 29, 16, 9, 2, 0, 0]",
+            "total_badness": 94.413874623
         },
         {
             "angles_tet": [
-                9.7311,
-                168.24
+                42.043,
+                88.484
             ],
             "angles_trig": [
-                10.368,
-                153.96
+                20.502,
+                79.749
             ],
             "ne1d": 0,
             "ne2d": 124,
-            "ne3d": 118,
-            "quality_histogram": "[0, 0, 2, 28, 72, 15, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]",
-            "total_badness": 549.67143776
+            "ne3d": 124,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 4, 26, 49, 28, 11, 4, 0, 2, 0, 0, 0, 0]",
+            "total_badness": 231.6979717
         },
         {
             "angles_tet": [
-                21.015,
-                128.39
+                23.979,
+                130.28
             ],
             "angles_trig": [
-                20.501,
-                112.39
+                21.654,
+                112.69
             ],
             "ne1d": 0,
             "ne2d": 258,
-            "ne3d": 356,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 2, 9, 27, 42, 47, 53, 46, 41, 33, 28, 13, 13, 2]",
-            "total_badness": 562.03525638
+            "ne3d": 365,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 22, 37, 56, 50, 43, 51, 29, 34, 23, 12, 6]",
+            "total_badness": 556.26115599
         },
         {
             "angles_tet": [
-                27.729,
-                134.58
+                27.682,
+                137.56
             ],
             "angles_trig": [
-                26.415,
-                114.11
+                26.982,
+                116.02
             ],
             "ne1d": 0,
             "ne2d": 658,
-            "ne3d": 2305,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 24, 51, 114, 246, 411, 474, 523, 350, 108]",
-            "total_badness": 2829.8918826
+            "ne3d": 2312,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 7, 22, 55, 136, 287, 383, 459, 515, 342, 104]",
+            "total_badness": 2855.6969029
         }
     ],
     "sphereincube.geo": [