Being a player that relies a lot on sound queues when playing, this bug has annoyed me for a long time. Please either remove the sound when the potion doesn't go off or, even better, play an 'error' sound if something prevents me from using one.
Ofc, this could all be remedied if potions were taken off the gcd, but I'm not holding my breath on that one.
Penitence Ildth - Bosmer Dragonknight Tank
Amity Jelain - Breton Necro Tank
Lynnea Elmrun - Bosmer Stamblade
Officer in Scions of Dawn