When using zwift Wednesday I noticed a lag of between 10 and 30 seconds from my kickr to adjust the power in erg mode.
This evening I noticed the same lag.
Then it stopped working completely. My avatar stood there on the side of the road.
Under bluetooth it showed the device connected but no signal.
I reset the power supply to the kickr but did not resolve.
Eventually I quit.
I shut down all other apps before zwifting.