When a small part in a peice is hollowed, the perimeter there becomes way too thin, much less than specified, and the piece fail and break. This happens so that the 2 perimeters don't overlap, but they should be allowed to.
cbd hello, Can you send your model to support@chitubox.com for testing?
Hi, I sent it now.
There is also another issue in the same project: After hollowing a part is created outside the model