Wild power fluctuations all of a sudden in erg mode?

Hey, as of a couple days ago, after over a year of no issues, I am getting wild power fluctuations when in erg mode, and the interval is steady. I am using the mobile app, on iOS. This isn’t with short intervals, and I haven’t had issues with them in the past regardless. It’ll be a 3-5min interval, at say 225w, and it’ll hold at 225 for a second or two, then drop to 160, then ramp up, hold and drop again. Its not a couple watts, its 50 or so. This happens at higher power, and lower power, as well.

I experimented with power smoothing on/off, redownloaded the wahoo app (using a kickr V5) and updated firmware, power smoothing on/off on the kickr itself, all the things I could think of. Turn off the kickr and reconnect, disconnect reconnect….

I did download mywhoosh or whatever, and it held power steady, so I don’t think its my kickr.

Any ideas?