When I have the resource pack disabled, everything is fine. When it is enabled, all of my inventory interactions are delayed by more than 5 seconds and then the server kicks me after maybe 10 more seconds.

If you're on 1.21.5, this is likely due to the uniform bug that I can't do anything about, it'd probably just completely tanking everything, shouldn't be an issue in .6 hopefully this is the only idea I have for why the resource pack is managing to break that badly