The biggest problem I’ve currently found with V2 devices is that audio volume randomly resets to zero, even without touching the devices - and honestly, very often, even when they’re set correctly, they just flat out don’t play, or play the wrong sound.
One more would be that when joining in-progress in UEFN games (likely as they use V2 devices), sometimes you run into the issue where sounds do not play for the rest of the game, and HUD message devices do not show up either.