UE4.16 to UE4.17 cause freeze on shipped build

Hi everybody,

I updated my project(VR) from ue4.16(working fine) version to ue4.17 and now the game randomly freeze.
I need some help thank you.

Nobody has clues ?

I’m getting a crash on level opening on a shipped build and i have recently upgraded from 16 to 17 need some help aswell, it looks like it’s the instanced Static Meshes


I also have random random freeze in shipping. Could it be related to these bugs?