Virtual Shifting Issue

Help! About three weeks ago my virtual shifting changed where every virtual gear is now registering 20-60 watts lower than before (e.g. gears 9-13 all fluctuate between 85-110 watts now) and once I get past 200 watts the perceived resistance doesn’t seem to match watts (watts under registering). I have a Kickr core 2 with Zwift cog and click. All firmware is current. I have uninstalled and reinstalled Zwift and restarted trainer. I even took out and updated my old core and it has the same issue. ERG mode works fine on both trainers. Is anyone else having this issue?

Sounds like what Mark is experiencing too