So the TabStrip randomly stopped working today. Didn't make any changes to any control-related files. The tabs stopped displaying, and when I try to open the (Custom) property page, I get run-time error 0x80010108 'The object invoked has disconnected from its clients.' at which point VB freezes and has to be killed from a process manager. No idea where this could be coming from.
I'm using it as a UserControl; added all needed files. It's been stable for years. A frame control also stopped drawing but deleting it and creating a new one fixed that issue; deleting and creating a new TabStrip however did not.