In AnkiDroid, after using undo you should be shown the card for which undo was used. This is normally the case, but not if you have a (re)learning card(s) for due in that time.
This would be completly fine if you were undoing only one change. But as it often happens, I would want to undo multiple reviews but then the (re)learning card(s) would be blocking my view in the review screen. I’m then left with my intuition to tell how many times undo needs to be pressed. @David Can this be changed somehow? IMO this creates unnecessary problems and isn’t helpful in any case.