Sounds like a NFS/kernel issue.
Have you tested local files to see if it's a network related issue?
I did try mounting the NFS share to an actual path (as opposed to using Kodi's built-in NFS handler, but as I don't want this machine to have local files on it, I didn't try loading them from a local path.
What did work in the end was uninstalling, deleting ~/.kodi, and then re-installing via Flatpak instead of Pacman. I think the Flatpak version is older, so the problem isn't happening anymore.
I have some music and videos shared via NFS and haven't had any problems playing those. Kodi has crashed a fair amount since updating to Omega, once immediately after launching Kodi. A lot of the time it was when playing video from YouTube and I've updated that plugin to a beta version and it's been better so far.
Fwiw, I'm using the flatpak install on Lubuntu
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