Having the exact same issue. Let us know if you figure this out, but I suspect Fujifilm messed up with the firmware update.

X100vi Godox xpro trigger  godox v1 flash  the test button on the trigger fires the flash. The camera seems to see the trigger attached and on, but the camera doesn’t fire the flash. Is it a setting or is there something wrong with my camera? I was at a workshop and borrowed a pocket wizard that worked with my Nikon, but not with the Fuji. 

I also have a Fuji XT-5. Mine doesn't have these problems. You should send it in for servicing.

I have owned the XT5 now since its release and I still have random shutdowns, difficulties with low-light - ISO performance and hard to get focus. How long can I wait before giving up and changing brand.  I also use a GFX 50R. Lets not go there.    

Prior to this I had a camera that would connect to my Oneplus12 (Android 15.0.0.840) via bluetooth. I did the update all appeared to be well though I didn't check the bluetooth connectivity. Then I saw the 4.3.1 bugfix update and tried to apply that through the X app ( version 2.5.1(1) ). Was told I needed to re-pair my camera. Tried to and couldn't. At the point where I have to confirm the security codes I confirm the pairing on the phone, then on the camera and the camera display sits waiting for the pairing confirmation and there's a message on the X App that tells me there was a communication error that prevented pairing. Eventually camera disconnects from phone. If I try confirming the camera then the phone I end up in the same place. I've deleted and reinstalled the app, restarted the phone. Nothing seems to make any difference. I did the update to 4.3.1 via SD card and nothing appears to have changed W.R.T bluetooth. Any ideas?