Keeping it brief here: tall characters levitate and small ones shrink into the ground under some circumstances. Even though this had a fix a long time ago, it is still not applied to your PLAYER opponent/s (and/or partners if on 2v2, 3v3 and so on) SPECIFICALLY if you are playing a song that has no map/void. If you somehow need a visual example or more details, please let it be known.
This same report had been left unanswered for months, guessing that m u c h o t e x t o; soooo it would also be much appreciated to receive an answer if someone's aware of this or if it cannot be fixed - for whichever reason.