This may be a Steam issue where Steam is overwriting the controls. I tried playing a game but discovered my controller's custom keybindings were ignored. When I rebound them through Steam, they worked the way I wanted. Hope this helps.
I've updated the plugin. I don't know if the update will fix your issue, but try it out and see what happens.
If it doesn't, then there might be a plugin compatibility issue (which I can't really fix, unless I have access to your project).