I am also having this problem, whenever mover runs everything slows down to a crawl, i can barely load the unraid webui, it is extremely slow.
any of the currently running docker containers all become unresponsive, if i'm streaming a movie locally from plex it stops loading completely, some dockers even crash and have to be restarted when the mover is finished even if their files are completely untouched by the mover. The communication between deluge and sonarr will be interrupted so torrents will get sent to deluge but it will not change its label, and when it is finished it will not move to its "completed torrents" folder, sometimes it will just hang at 100% and never actually "complete".
mover tuning is enabled and these are all my settings