Hmm, that sounds strange indeed… Is the “Account created” alert and the login action in the same workflow? So you know that this workflow is triggering?
One thing that comes to mind is the recent change to how Bubble handles error message when logging in. I’m sure you’ve read about it here. If it used to work, and then stopped, maybe there could be an issue with that?
Also, how’s the log looking? Is the login action running, and can you see anything out of the ordinary there?