Interference probably is not the problem. More likely an app on your phone fighting another app on your phone. Are all your bike sensors and HR paired only to the Wahoo? If not, I'd pair everything bike and HR related to it and not have them paired to the phone.
Though I don't know how Wahoo's work, if they rely on the phone app to do sensor pairing, then that's bizzare IMO. Though other people have more than you, so there is something, likely on your phone, just not playing with others correctly.