...mine was haivng the same issue yesterday. I eventually fixed it by unpairing and repairing everything several times and turning off basically all other bluetooth devices in the house... but now I'm wondering if there's a zwift issue!
I wondered whether it was me or zwift - hoping it was the latter! I've had it happen before, but not in a long time, and it's typically been when broots had another device paired to the trainer and left the blue tooth on that (which wasn't the case today).