Ubuntu 22 client and server (5.15). Mount is 4.2, sec=sys. I add a user to a group, but they can't see things that the group should be able to see. /proc/net/rpc/auth.unix.gid/content shows that the nfs group cache has their group membership. Doing a mount -o vers=4.1 works (4.1 to force a different context). Other users that didn't try before work. It's been several hours, and 4.2 still won't work for this user. What do I need to flush? Note that I'm using gssproxy on the server.
