If it's any bit of helpful information, I occasionally have this issue (on 18.04) and it is fixed by a proper shutdown and boot. It seems to happen for me when one of the servers that I sshfs to crashes/becomes unavailable (or something else server side) and the issue persists past the time in which the server is back and functional.
If it's any bit of helpful information, I occasionally have this issue (on 18.04) and it is fixed by a proper shutdown and boot. It seems to happen for me when one of the servers that I sshfs to crashes/becomes unavailable (or something else server side) and the issue persists past the time in which the server is back and functional.