I have the same problem and the reason seems to be a “defective charging chip” inside the PPM -Support is checking how to handle this, probably with a RMA.
Before contacting them “you can also purchase any inexpensive 60W power adapter, which will charge the projector when off, at reduced 45W power since most of them can’t supply 4A current.”
If the problem doesnt exist with the Third-Party PSU, then “you should contact support to get a replacement power adapter and cable first. Only send in your projector if that doesn’t solve the problem.”