When working with the model that is causing a crash when closing face with many edges I noticed a different issue:
When I delete the edges that allowed me to close the whole face, the edges lose their precision, most likely to the scale factor of the component of ~0.0001. As I have shown in the gif - the quality reduction is not something that couldn’t be prevented as the original scale can keep the precision. I have done copy/paste of the original edges and the component healed itself.
It is a question to SU developers, whether this loss of the precision could be prevented/healed automatically?