That happened to me as well, I put it down to "fucking password manager, it's broken again".
For example, BitWarden has spent the past month refusing to auto fill fields for me. Bugs are really not uncommon at all, I'd think my password manager is broken before I thought I'm getting phished (which is exactly how they get you).
Yeah i could totally see how someone in a bind working off of phone could get p0wned like that
The ability to autofill by domain is a critical function of a password manager. It sounds like this tool is performing a lot worse than your browser's built-in password manager -- maybe that's enough to encourage a switch?