Could not figure out the cause of this, but it's definitely not supposed to happen.

Sometimes, when equipping a gun (any gun), the sound that is supposed to play is replaced with a random default minecraft sound. Could be anything from a cow mooing to a footstep.

I also believe the sounds played when shooting and reloading could possibly bug out the same way, per my friend telling me so while playing on our server.

I have this issue as well

It happens with some or all gun related sounds for me BTW, not just equipping.
I'm on Fedora 41 Linux, I think it only happens when I have my Bluetooth headphones connected but I'm not sure if that's just a coincidence. I also play on a multiplayer server.

Relogging seems to fix it BTW.

Just got the bug again, it definitely has something to do with my headphones, maybe switching audio sources causes it? The sounds it chooses also seem to be dependent on the environment, I connected my headphones after entering the nether and the pullout sound was replaced with a piglin oink, I came back to the overworld near some wolves and the put away sound became a dog bark.

Same issue. I can confirm that it seems to be related to audio output somehow.