I was thinking about it during this day and before doing additional test I want to do a reasoning with you.
I use the drivepool software to create the H drive:
The H:\Anime folder is usually from the poolpart in the Q drive
As you see in the screenshots the Anime folder is composed of 2.23TB taken from Q drive
On other drives can remain empty folders like this example:
When the Q drive goes off this cause an I/O error but the pool remain "stable". The H:\Anime folder is not missing but is taken from the poolparts that have something related. In our case after the Q drive shutdown, the H:\Anime folder is showed like this:
So in the next attempt rclone see the H:\Anime folder but is composed of only empty folder taken from other drives.
Are you following me?