Just submitted a bug ticket and I'll mirror it here for anyone else that might run into this. Weeks from first finding this, finally figured it out! The spawnactor/createwidget nodes don't update properly when you change variable types from a struct to a different type of struct which allows for mismatched types and then causes crashing when trying to actually access the values they contain. LogWindows: Error: Crash in runnable thread TaskGraphThreadBP 25 LogWindows: Error: 0x00007ffc5736d4d1 ntdll.dll!UnknownFunction LogWindows: Error: 0x00007ffc57197c24 KERNE元2.DLL!UnknownFunction LogWindows: Error: 0x00007ffbcf5c2f94 UE4Editor-Core.dll!UnknownFunction LogWindows: Error: 0x00007ffbcf5c32ef UE4Editor-Core.dll!UnknownFunction LogWindows: Error: 0x00007ffbcf15254b UE4Editor-Core.dll!UnknownFunction LogWindows: Error: 0x00007ffbcf14a40d UE4Editor-Core.dll!UnknownFunction
LogWindows: Error: 0x00007ffbcf14931a UE4Editor-Core.dll!UnknownFunction LogWindows: Error: 0x00007ffbd222fd91 UE4Editor-CoreUObject.dll!UnknownFunction LogWindows: Error: 0x00007ffbd2228e38 UE4Editor-CoreUObject.dll!UnknownFunction LogWindows: Error: 0x00007ffbd225a2a5 UE4Editor-CoreUObject.dll!UnknownFunction LogWindows: Error: 0x00007ffbd2416896 UE4Editor-CoreUObject.dll!UnknownFunction LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff LogThreadingWindows: Error: Runnable thread TaskGraphThreadBP 25 crashed. The TaskGraphThread varies between BP and NP and the number changes but the rest is always the same. Here's the relevant part of the crash in the log.
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