Hi Sean,
I reopened the project and now the issue is gone. It makes the problem even more weird, because I haven’t done anything else since my original post then giving up and closing the editor. Obviously I tried to restart the editor and my PC several times but it didn’t help then.
I also found out that the crash only occured if I made changes in two specific event graphs in that Blueprint, nowhere else.
I cannot provide a fresh log, as the issue is gone, but I sent the crash report every time with my Machine ID, allowing Epic to contact me, so I hope those will help you guys find out what just happened (there are plenty, I tried to pinpoint the issue).
Thanks for the support!