Apple did an extended warranty for the APP for that issue. You might check to make sure of your eligibility. I got mine replaced not too long ago because of the static/vibrations. Replacements have been great.At C$70 cheaper than the Air Pods Pro, I'm willing to try.
Disappointed with my APP as one started to vibrate 6 months after warranty expired. Not buying a replacement.
Also just purchased these Fit Pros and they should arrive today. The APPs do fall out of my ears if I do any kind of exercise. So the APPs will be for normal day-to-day work/life, and the Fit Pros will be for exercising and more active scenarios.