The Rats only very rarely transport Items if I say them to do, they mostly dont follow me and aren't really smart.
They walk against walls, dont even move entirely, walk into water and cant get out etc.
I dont have any performance Mods too.

My Version: 1.20.1
My Modloader: Forge (Dedicated Server)

Hey @GizmoTheMoonPig, sorry for not closing this but the Problem has been solved, my Chunk Claimer Mods have been causing a bit of Issues.

Im gonna need a LOT more info than just this. Can you give me a modpack name/download to do some testing with? I know theres a few problems with pathing (mainly with the quarry upgrade and flying rats) but things like transport and especially following (as this uses vanilla's follow logic) should not really be having problems