Apple Pencil 2 don’t charge - but is connected to bluetooth

Hi and hello

I googled a lot about the topic and found some threads here - but no solution.

I have a iPad 12.9” with apple keyboard and apple pencil 2. I have the issue, that the pencil don’t charge while connected to bluetooth. So it is working until the battery of the pencil is empty. I tried everything: unpairing and pairing again, restarting iPad... But no solution. Randomly, the pencil starts working again until the issue comes again some days later.

I’m pretty sure, there is no issue with bluetooth. It has to be in the charging soft- or hardware?

Would be happy, if there is any advice, solution or whatever :)

Best, Chris