I have the same Problem..
However, if I start OBS (this also works while Warzone is open) and then add a game recording or the monitor where Warzone is running on it as an image source, my Warzone simply freezes.
I can then only open the task manager and exit Warzone.
I never had that with the first part of Warzone.
It doesn't matter if I start OBS first or Warzone 2 first.
As soon as I insert the game into OBS as a game capture or image source, Warzone 2 crashes and freezes without an error message.
All other games running fine, only WZ 2.0 freeze on OBS..
Hardware:
Ryzen 7 5800X3D - MSI B450M Pro M2 MAX - 32 GB DDR4-3600, M2-SSD, RTX 3080, Windows 10 2H22