Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

To clarify the issue, you are unable to use the PS4 controller while using Bluetooth, correct? However, it will work if you connect via USB?

When connecting via Bluetooth, do you use a Bluetooth adapter, or is it integrated into your PC/laptop?

Do you use any other programs to connect the PS4 controller to the PC? Do you play the game through Steam or use any of the controller options through Steam?

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!