Sound "sticking" bug?

[munchkin]

Tonight I experienced something completely new that I haven't before.

I was using my towing account (lakrits) to tow myself and a squadmate out. Had the truck standing close for ammo resup. After a while I drove off to top squaddie off. When I got back and turned the engine off the engine sound stayed into my main account (munchkin).. checked back on the towing computer and no engine sound there, started it up and now my main had two engine sounds.

Tried driving away with it and then both sounds got lower and lower the further away the truck got.. though, one was the real current noise with revs changing from gear shifts and so on, the other was the same as when the truck was still, just lower and lower the further away..

Drove back and both sounds increased in volume. Shut the engine off but that first sound was still there in my main account. That didn't go away until I despawned my towing account.

I don't know if this is related but throughout the entire mission the tow account had a concussion bug more or less the entire time. My main account did not experience any of this.