Getting hard crash when inserting container before module

[UrsBollhalder]

Whenever I try to Add Processor before this module and then add a Container, I do get a hard crash. This is something that has been going on for a longer time on my system, not just recently. Also when deleting containers, I tend to get crashes! Anyone else seeing this?!

macOS BigSur, develop branch

[Matt_SF]

@ursbollhalder catalina and develop, never happened IIRC