RPM reading seems way off

Hi I’m running wahoo speed and cadence sensors attached to my bike. Bike is on tacx rollers. When I use wahoo app, my rpms are 80-100 range. When I’m in game, like today’s stage 7, my rpms are in 40-60 range. Anyway have a clue as to why this is happening? Cheers!

Did you check on the pairing screen to see if your cadence sensor is actually connected to Zwift? Are you running Bluetooth and possibly still connected to the Wahoo app?