wearing any armor that you have insulated yourself makes the sound effects of opening your inventory and clicking on any item play the armor equipping sound. the more armor pieces you are wearing that are insulated, the more common the sound effects are playing.

Forge 1.20.1

Cold Sweat 2.3.12

i cant seem to replicate the bug in the latest beta so i assume its been fixed somehow

Ah, alright then. Good to know 👍

Is there some kind of sound mod you're using? I don't get this bug when testing it myself.