Soundcore Space One won't power on

I only had my Space One’s for a day before I ran into an annoying problem. After charging, I can only turn them on a few times. Then, for no apparent reason, they refuse to turn on until I connect them to a charger for a few minutes. Using the reset sequence, holding power on and volume up for five seconds also works to buy me one more listening session before having to do either of these unnecessary steps again.

These things are amazing in all other respects and I’m hoping someone can tell me how to resolve this. (This was a gift and I would like to avoid having to return them.