When "?" characters appear, I would always direct them to my topmost floor (58 as of now) for the maximum income. On a few occasions though, I've noticed that some of them were always forced to step out on the 40th or 40+ floor. Initially, I thought this was due to my not putting my finger properly on the "up" button to propel the elevator to continue moving upwards.
Sometimes when the lift "jams" this way, I would quickly put my finger on the "down" button for a couple of floors before pushing the "up" button again and this usually solves my problem. But just now, when I tried to move down, the lift wouldn't budge. It wouldn't move any higher as well, and my bitizen was forced to exit and walk the rest of the way up instead of reaching his home comfortably.
Does anyone else experience this elevator failure? Is this a bug?