I’ve seen the stairs appear without the pop-up a few times. But clicking on the stairs again always gave me the popup (and I chose to Stay, because it’s a low-level account).
Opened 4 panels.
Clicked on stairs and chose to Stay.
Clicked on the final boss but didn’t fight.
Clicked on Dungeon Offers and got the “Stairs already used” error.
Happened to me today, can’t cause the pop-up to appear. As all fights were done, I can only access pop-up that explains what those 2 traps did. Absolutely nothing happened when click on the stair.
It seems to be a loading issue, as the stair was the first room I clicked, and Dungeon was the first mode I interacted with as well when I open the game on my Android phone.
I think playing other modes first, and click everything slowly, might be able to prevent this.
The code right now might have a delay in respond, and instead of breaking the progress to next step, it just skipped the choice part somehow.
I definitely get the same issue on rewards (eg: gems) if I’m clicking too quickly: the pop up doesn’t display. Probably some thread issues. Both on phone and PC.
I think it happens when the stairs is the last door, or happens more likely when the stairs is the last door. Happened to me yesterday with ascending stairs. But clicking on the stairs again activated the popup.