carmine_Schroeder answered on March 19th 20 at 09:21
FastTrack is roughly the labeling of packages. Accordingly, IP Firewall Mangle, and then look at the rules of labelling.
Perhaps you meant FastPath, then Bridge - Settings - Allow FastPath and IP Settings - Allow FastPath.
If you're talking about the default configuration - remove all firewall rules associated with FastTrack and restart Mikrotik.
Jeremy answered on March 19th 20 at 09:23
Dynamic rules fasttrack there is such a thing that even if you disabled the firewall rules, which include fasttrack, they will not disappear until you restart the router.