The update mentioned by Pau should has just been released along with other updates. For more information, you can consult the corresponding blog post: https://xcp-ng.org/blog/2026/03/10/march-2026-maintenance-updates-for-xcp-ng-8-3-lts/
Not sure if related to this. But now all my vms are failing back to full backups.
Attached is the first backup when all vms fail back full backup and the most recent backup log. All backups in between were full backups.
2026-03-07T05_00_00.117Z - backup NG.txt
2026-03-10T04_00_03.845Z - backup NG.txt
Backup file before vms fail back to full.
2026-03-06T21_42_15.233Z - backup NG.txt