The ([ V] of costume [ V]) block, when the first dropdown is empty reports the costume itself, serving as an alternative to creating a costume () block. Unlike that block, the ([ V] of sound [ V]) block, despite being the sound counterpart, reports 0 instead of the sound itself if the first dropdown is blank.
Neither of these behaviors I believe is intended, but obvious inconsistencies such as this shouldn’t stand anywhere here. Tell me not I need to create a sound () block.