Not sure if this is helpful, but these are the vertex positions. There are 11 vertices in total.
0: 25.98, 15.00, 0.00
1: 13.54, 11.36, 0.00
2: -13.54, -11.36, 0.00
3: -25.98, -15.00, 0.00
4: -34.89, -12.70, 0.00
5: -40.50, -7.14, 0.00
6: -42.43, -0.00, 0.00
7: -40.50, 7.14, 0.00
8: -34.89, 12.70, 0.00
9: -25.98, 15.00, 0.00
10: -13.54, 11.36, 0.00
As you can see there is no vertex at the origin this time and there is no loop.
Hello again!
This time extrusion stops in the middle.
Not sure if this is helpful, but these are the vertex positions. There are 11 vertices in total. 0: 25.98, 15.00, 0.00 1: 13.54, 11.36, 0.00 2: -13.54, -11.36, 0.00 3: -25.98, -15.00, 0.00 4: -34.89, -12.70, 0.00 5: -40.50, -7.14, 0.00 6: -42.43, -0.00, 0.00 7: -40.50, 7.14, 0.00 8: -34.89, 12.70, 0.00 9: -25.98, 15.00, 0.00 10: -13.54, 11.36, 0.00 As you can see there is no vertex at the origin this time and there is no loop.
Thanks! ExtrusionTest3.blend.zip