I don't think I can use the default Plex behavior that ships with Remote Buddy, because I am using a Harmony remote and needed to customize each button. I setup everything from scratch. All the other buttons work properly except for the Enter button.

When I'm on the settings page for that behavior, if I click "Run actor", it works properly. It never double-clicks, no matter what the key setting is. But once the behavior is installed and I'm using the Harmony remote, it will often double-click. I've disabled the Plex internal remote handler, I've increased the repeat time on the Harmony...I don't know what else to do!