Peak power breakthrough...decrease in Threshold, HIE and Peak Power?

Is this just due to a better fit to my actual power profile? Haven’t done a lot of peak power work so far this year that significantly depleted HIE, tried some maximal intensity sprints sprinkled into my ride yesterday

Yes, Xert determined that the new fitness signature fits your data better. You can go out and try to beat it again if you believe the new signature is too low.