Most likely not noticable but while adjusting the dungeon a bit for the advanced version I found the following:

The elevators have a platform. When the elevator moves you down (falling animation), there is tile change event which removes that platform. This allows the impression that this platform moves down with you. This is not the case for elevators which lead up. Because the platform is at the ground and making it disappear won't add any value here or make it even worse.

So instead of a normal teleport event from one level to the other, for downwards elevators there is the tile changed event followed by the teleport event. However when you go back up, the platform would be gone and this would look awkward.

So for example in level 3 there is another event at your spawn location from level 2. This just resets the platform on the level 2 elevator. So if you go up again, the elevator looks as before.

But this event is missing in level 2 and level 4. So if you go from level 1 to level 2 or from level 3 to level 4 and then back up, the elevator in level 1/level 3 is missing the platform forever.

This can be easily fixed by adding tile change events to level 2 and level 4 at the spawn locations.