You have two options:
-
Unmap NPP from the hat switch or
-
Unmap Freelook toggle from the mouse.
Either should stop the freezes. I’ve actually unmapped both as I couldn’t stand the change they made in SU7 where exiting freelook toggle reset the zoom level. I now use freelook hold mapped to the right mouse and mid-click to load custom camera views.
Also, other users have reported that if you map Freelook toggle to the right mouse button that will not trigger a freeze with NPP. But that didn’t work for me.