Bug where animations' Sound Events can be heard everywhere

[DXing]

What the title says, there are some animations where the Sim's voice will be heard everywhere instead of just locally. I've been aware for some time that some animations do that, and I've even seen somewhere a while ago one animator themselves commenting on it, but I can't quite find any information on this.

Basically, my question is what causes this issue? And if we're creating animations, how can we avoid it?