Chitubox crashes consistently when I perform the following actions:
1. Add a support
2. Edit the middle and move the support, usually away from the model. This causes the contact sphere to disappear.
3. Select the top and shift it a bit.
4. Resize the contact depth
5. Try to move the support top piece.
6. Top piece disappears and Chitubox crashes.
If not using sphere contact shape, in step 6 the top piece disappears but there is no crash. Support is useless and must be deleted.
This happens in 1.6.3 and 1.6.4.3 beta.