Pinebuds Pro keeps powering on while charging

Had the Pinebud Pros for a few weeks, and I can'take heads or tails of when they power on/off. Very often, when I put them in the case to charge them they stay powered on, so I have taken to turn the off before putting them in the case.

Some time that works and they stay turned off. Some times they power on when I insert them into the case. Other times they stay turned off, but powers on after a while. They also seem to turn on when I touch them inside the case, or when I open the lid.

This behavior is quite annoying since every time this happens they pair with my phone and steals the audio output.