I have one character, an Orc, that whenever I move the curser over him under certain conditions, even when he's naked with no pets or mounts, it makes an explosion sound.
I have 3 characters created after him. If my Orc Crafter touches my Breton, Redguard, or other Orc that were created on the same day but after, then the explosion sound happens when he's highlighted. If this particular orc does not have one of those 3 characters immediately above or below him, then the sound doesn't happen. He can be positioned anywhere within the other 8 characters that were created before today without the glitchy sound effect.