Connection problems between flux s and zwift on macbook

I’m having problems pairing Zwift on my macbook pro with my Tacx Flux S.
I can connect via my iPhone ( zwift app and companion app) so I know there’s an output from the Tacx, but using the iPhone is far too small for me when cycling. Also the bridgemethod with the companion app isn’t working verry well. The resistance goes all over the place when the gradient goes over 4%.

3 weeks ago, everything was working verry well. Please fix this!