Hi MrBallantine,
Sorry for the delay. Yeah, it does repro like you said; however, the fact that recompiling fixes the issue is troublesome for a bug report. We would need a repro that essentially breaks the blueprint like in your original project. But even then I still believe it’s related to project conversion and is likely unfix-able at this point.
I know this isn’t fantastic news. Does it also occur in a new blueprint in your existing project? If not, is recreating the blueprint an option at this point?