Old problem considered fixed, reappeared
I've seen a topic from years ago, this one https://support.mozilla.org/bm/questions/1416148 On the linked bugzilla page, it is considered fixed, however, a few days ago I started noticing the same issue, namely, on pages from websites on which I have multiple logins, tapping on the desired username doesn't do anything, doesn't fill in the required login details, but the saved passwords firefox popup disappears as if it had filled the proper fields/data.
Firefox 130.0 (Build #2016041319) Android 14,device is moto g34 5G Regardless of the network connection used (mobile data / wifi), behavior is the same. On some days it works, and tapping on the username does fill the input fields, on some other days it doesn't work, tapping on the username doesn't do anything.