I had trouble getting my Life P3 earbuds to stay sealed in my ears. With a little movement in my jaws they would loosen up. Then I tried them in the opposite ears and upside down, with the stems pointing up. Now I get a perfect fit that stays in place. They are more comfortable and secure. The fit test passes every time. The stems act as a “hook” to keep them in place.
I can set the controls with the app to be opposite, and all is well. But is there a way to send stereo music to the opposite bud. If not, I can live with it, but maybe that would be a good future update to the Soundcore app.