No user comments in crash group
No known steps to reproduce
Access violation - code c0000005 (first/second chance not available) <unknown module>!UE4Editor_SubstanceCore!SubstanceAir::GraphInstance::~GraphInstance() <unknown module>!UE4Editor_SubstanceCore!USubstanceGraphInstance::CleanupGraphInstance() <unknown module>!UE4Editor_SubstanceCore!USubstanceGraphInstance::BeginDestroy()
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-56230 in the post.