hello,
might have something to with --max-duration 10h
"Rclone won't exit with an error if the transfer limit is reached."
so it could be that rclone hit that 10h limit and then continues to try to transfer files.
can you post the top 30 lines of the debug log and the first time you got that error in the debug log.
that will provide the timestamps
might want to take a read of
https://forum.rclone.org/t/max-duration-and-retries-not-working-correctly/27738