A year and a half ago, the first device that Sense identified was my garage door opener. The profiles while raising/lowering the door looked slightly different. In any event, as of last week, Sense recognizes the opener while lowering the door, but not while raising it.
The capacitor for that motor hasn’t been changed in 12 years, so it’s possible that the power use profile for raising the door has changed. But it’s also possible that being Sense has “forgotten” the pattern and will “remember” it again after a while - that’s happened with other appliances.