I remember seeing that on the crash log aswel… Since the other 3 maps had the same landscape with the same group of assets on each, there was no possibility the issue were with the assets, so the thought that the 1st map was corrupted somehow came to my mind. I just replaced it and the issue was gone.
I do use MPC in a material with an Actor blueprint.
At the time I have the 1st crash what I did was just change a project from 4.21 to 4.22 and I didn’t delete the Intermediate folders previously and I do think leaving the previous Intermediate folders are contributing for the crash and corruption. I need to test this more and try to replicate this.