So this is a long and old running post but I can not find the answers I found before.
This occurred in the editor around Toast notifications like when blueprints or shaders were compiled. When the toast would fade out and be removed, BOOM, crash.
I had found some changes that I just kept in a personal perforce change list that gave the system retries ( I think it went to 10 ) for the attempt instead of crashing immediately and this basically made my experience stable again. But I am having a hard time finding that code again as this is now not happening on my system but on another persons. Has anyone come across those changes in their hunt for this? Id love to snag them again and get my shelf back just in case its needed.