hello, i'm experiencing the same issue as Elrainia. I'm running MacOS 10.15.3 and PathFinder 9.0.5. Please can someone from the Cocoatech team acknowledge that they have seen this thread and will act on it.
I've wrestled with the NFS/Catalina/PathFinder issues at various times over the last 3 months and although this isn't a solution that's going to be acceptable to most. This is what I've done:
1) Migrated away from NFS to SMB. I don't have any faith that Apple are going to support NFS going forward.
2) Changed my workflows so as not to need auto mounting (as much). I've switched from some code I wrote back in 2001 (used to backup various systems using rsync over NFS) to TimeMachine backing up to a NAS over SMB.
3) Sadly, I've almost ditched PathFinder for ForkLift 3. I've been with PF for the best part of 15 years, but the level of support (or lack of it) has lead me to look elsewhere. ForkLift is missing a few features that I love in PF, but it's speed, simplicity and the way it handles network drives has pushed me to the point where PF is no longer my default file manager.
I hope everyone wrestling with similar NFS issue finds their way through the mire sooner rather than later...