I have a PS5 controller, which has an extra Mute button. In Main, I have defined the Mute button as the menu button.
It works fine in every other core I've tried. However, in the PSX core, sometimes the menu isn't activated when I press it, and instead I get a line that says "Light gun mode is ON" (or OFF). Other times it seems to work fine.
This has ruined some saves already for not being able to bring up the menu in time. Is this by design or is it a bug?