By shaking your phone right after a left-swipe that is incorrect you’ll undo the action.
Backtracking on Bumble

Unlike on Tinder, where in actuality the capability to get a redo is a premium function that costs additional, on Bumble you can easily backtrack absolutely free. It is additionally as simple cake. You shouldn’t have swiped left on someone, all you have to do is shake your phone if you realize.