Github Proyect.
https://github.com/kone9/unreal_gener...
Inside the Unreal project go to the cinematic/sequencer folder and open the "master Sequencer".
Automatically when you open the master sequencer the editor will crash.
If it doesn't crash, make visible all the level sequencer that are inside.
If it doesn't crash, put play and there I know it's going to crash.
I have no doubt that there is a bottleneck in the level sequencer.