Hi Homer,
After some further testing, I fear you are correct.
The issue reappeared again yesterday and a further two reboots have fixed the issue. It’s highly frustrating. I’m wondering what I will lose by moving away from BTRFS. I’m under the impression that I will require more storage to run UrBackup?
Is there another filesystem that you would recommend? I was originally planning on rolling BTRFS out to all of our production systems to easily perform snapshots when backing up, but instead I’ve switched to using EXT4 on LVM. I can’t risk these sorts of issues taking down our production systems.