I have been using a DIRCON module with my Kickr V6 (and V5 before), it has been very reliable and stable. Now with version 5.6.20, during pairing, it is not even selectable on the Power or Speed Sensor list, only BT, WIFI, or ANT are shown.
I verified using the Wahoo app that it is operating normally and is discoverable on my home LAN, and my router shows it as an active device with no issues, and the green LEDs on it are illuminated, one steady, one flashes. No other PC (Win 11 Pro) or device issues.
Any ideas? Thanks!
Router:

DIRCON LEDs
The WiFi icon means Ethernet now in Zwift, for reasons only they can explain. Apparently if you have DirCon then the trainer will never connect via WiFi.
I tried an experiment and paired using the WIFI icon option for power/resistance/cadence while the DIRCON module was connected, powered, and visible on my LAN.
My Play and HRM are connected utilizing BT:
Started a route, then verified devices:
Then I unplugged the DIRCON module and nothing changed or disconnected, so it must be utilizing the WIFI connection and not the DIRCON module. I don’t believe they automatically swap with a connection failure (I could be wrong though).
So it appears that selecting the WIFI icon during pairing with a DIRCON module connected will use WIFI and not the DIRCON. No?