Also having issue.  Didnt see the issue until my Remote SR has ran out of free space.
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                    "path": "/xo-vm-backups/e0a3093a-52fd-f8dc-1c39-075eeb9d0314/20251103T053124Z.json",
                    "actual": 65131249664,
                    "expected": 65147677184
                  },
                  "message": "cleanVm: incorrect backup size in metadata"
                }
              ],
              "end": 1762148821309,
              "result": {
                "merge": false
              }
            }
          ],
          "end": 1762148821310
        }
      ],
      "warnings": [
        {
          "message": "Backup fell back to a full"
        }
      ],
      "infos": [
        {
          "message": "Transfer data using NBD"
        },
        {
          "message": "will delete snapshot data"
        },
        {
          "data": {
            "vdiRef": "OpaqueRef:68285439-7986-bd76-a88a-5da4a381d548"
          },
          "message": "Snapshot data has been deleted"
        }
      ],
      "end": 1762148821310
    }
  ],
  "end": 1762148821310
}