I too get the !GetIsActive() error message ever since, probably even an earlier beta than 24. If anything it’s quite frequent and is happening for everyone in our team. However we do not experience any crashes like you describe (other than using HTTPS URLs with UnityWebRequest that the QA team refuses to reply to me about .)
Ok, searching the code, it’s somehow Profiler related. Perhaps not the crash source, so getting a bug when the crash occurs might be good. Will pass along at least the error message regarding !GetIsActive to the right team.