automounting NFS 4 results in kernel panic

Has anyone been able to get a working NFS 4 automount in Mac OS X? I'm desperately trying to find a way to automatically mount a NFS v4 share from my NAS to my MacBook Pro with Mac OS 10.11.6, but keep hitting a kernel panic. Upon boot/login, the automount works perfectly. And I can manually u/mount the share (mount -o nfsvers=4 nas:/nfs/htpc-media /tmp/foobar) without trouble. But when I put my Mac to sleep, I get a [kernel panic](https://support.apple.com/library/content/dam/edam/applecare/images/en_US/osx/panic.png) about 2 seconds after waking it back up. NFS v3 works a *little* better, but it will still occasionally crash after a few wakes. I'd really prefer to run v4 services only. Here's the client setup: - **/etc/auto_master** # # Automounter master map # +auto_master # Use directory service /net -hosts -nobrowse,hidefromfinder,nosuid,nfc /home auto_home -nobrowse,hidefromfinder /Network/Servers -fstab /- -static /- auto_nfs - **/etc/auto_nfs** /nfs/media -fstype=nfs,nfsvers=4,soft,intr nas:/nfs/htpc-media And on the NAS (running Debian Stretch): - **/etc/exports** /nfs/htpc-media *(ro,no_subtree_check,insecure,fsid=1) Stuff I've tried: - turning off firewalls on both ends - using IP addresses instead of hostnames (i.e. 192.168.1.99 instead of nas - rules out DNS issues) - lots of permutations of client mount options - booting Mac OS X into safe mode (rules out kext) - poring through Console to see if there's anything interesting or related - automounting shares from a completely separate server (rules out server misconfiguration) Am I missing something obvious? Any help would be appreciated. Happy to post crash logs if that'd be useful.