Hey there @WTS6697! This is one I haven’t found a good answer to why it happens, and worse even it’s an issue that when it occurs it can occur to many MANY types of objects. It’s quite literally likely a Bool somewhere that is causing the issue, but running through the callstack and verifying it is much harder. Slightly different line location since there’s was a different variable type however. The problem comes with identifying which variable is causing this. A couple of users last year found a solid way of doing it, however the cost is that you have to use the debugger. Which if you don’t work from source/know what you’re doing it going to be a bit harder.
Post 20 by Fury22PL is the one that can help identify the var that needs to be deleted and reintroduced.