I've tried remapping but it doesn't work. On a fresh boot or a restart of Emulation Station the controllers work perfectly. However, if I play a game then leave or unplug the controller and plug it back in, the controller is completely unresponsive, it doesn't matter what kind of controller is connected or by what method.
On the 8Bitdo's the light on the controller even shows its connected but it is completely unresponsive.
This has only happened since I upgraded to version 8. Before this I had no issues with any of the controllers, and even now they work fine... as long as I don't unplug them or let them go to sleep.
Prior to this the only weirdness I experienced with my SN30 pro+ was that while is one of the game/system lists the list would randomly jump around between games. No issues playing the games or while in the main screen. This issue still exists but not a deal breaker. The controller connection issue has become a major headache, I'm hoping this gets fixed in the next update.