1P stopped working with Vivaldi Android

Yeah the Android operating system, keyboard app, 1Password, and the destination app all have to work together.  Apparently it's a house of cards since it fails far too frequently.

I suppose the phone manufacturer may play some part too, I do know Samsung does a lot of customization of Android. But my impression was that's mostly a skin; I wouldn't think core functionality like autofill would be affected by anything Samsung does.

Although Samsung does have their own password manager, and I remember one time an app or website was trying to save a passkey, and it insisted on trying to use either the Samsung or Google passkey vault, and would never give me the option to save in the 1Password vault. So I guess Samsung can cause some issues of their own, too.