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).
For me it wasn't even a phone, it was on the desktop, I'm just so used to everything being buggy that it didn't trigger any alarms for me.
Luckily the only things I don't use passkeys or hardware keys for are things I don't care about, so I can't even remember what was phished. It goes to show, though, that that's what saved me, not the password manager, not my strong password, nothing.
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?
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).