← This
Fixed my problem with FAB, wasn’t even looking for a solution at the time, was trying to resolve the OP’s issue - this thread gives a valid workaround for both problems. Many thanks, hopefully Epic will fix the nsswitch incompatibility and AMD will fix the GPU hang issue.
EDIT: Spoke too soon on the first (OP) issue - yes, it works partially… instead of hanging the GPU at start on a simple template project, it will work (well) for about 20 minutes… then hang the GPU. In this case, it hanged hard, and it persisted across reboots - I had to let the machine cool down for an hour or so before I could use it reliably again. I think I’m done playing around with this and will wait for a driver update 
For reference, I’m on an RX 7900M (laptop)