Watt / Sensor Issue riding with several bikes in one room - Wahoo Kickr, Apple TV,


Im having the issue that a kicker can get “ghost-watt” increases if two Wahoo Kickrs are in one room

The setup is:
Wahoo Kicker 1 - Apple TV - Connected with Zwift Compagnion
Wahoo Kicker 2 - Macbook - Connected with Bluetooth

Both pair the sensor prior the ride, all a sudden on of the Kicker has issues with the watts and the ride continues even when not peddling.
First thought was that there could a some interference as the bikes are standing less then 2meters apart but even moving one of the bike to the room next door did not resolve the issue.

Anyone having similar issues ? How could this be fixed?
Thanking you in advance for your help.