Hi guys.
Apparently, Xbox Series X controller still has a lot of issues on the Bluetooth connection.
It's not only FF14's problem.

I saw this forum below.
https://answers.microsoft.com/en-us/...40b25f?page=14

Intel's Bluetooth (embed on a motherboard) or Xbox official receiver are the only solution right now.
(A newer BT version (like 5.0) is not also working )
It looks like the controller connected via Bluetooth working as a DirectInput controller which FF14 does not support.