Sorry for the long title :D
I just got the “Razer BlackShark V3” headset, and it was working fine on dongle. I didn’t test it on wire mode, but it was charging normally.
However, after firmware update, the dongle stopped working (lightning doesn’t show at all), and I cannot connect the headset to it . It does register in windows settings though:

I cannot do firmware update now, because I cannot pass the check for “Connect the headset to your PC using the usb type a to usb type c cable”, because it doesn’t register the headset for some reason.
I cannot update either the firmware for “BlackShark V3” or “RazerAudioPairingUtility” - same thing happens.
I think this is similar to this question, but additional problem is that the headset is not detected.
I also tried different cable, but the result is the same.
Also when I change modes with double clicking on the right button, sometimes it beeps twice. I don’t know why, but maybe that means something.
One important thing to notice is that the headset is working fine when I connect to bluetooth from my phone.
This is what it is showing on Razer Synapse when the cable is connected to dongle and I can’t pair it:

