Hi, @starlight , and welcome to the forum.
A question: when connected, does it show in the info of the screen “fast charging” (if supported by the charger and cable) or “slow charging”?
My advice is to first try other chargers and cables, to see if that’s the problem.
In case nothing improves, try cleaning the port and connections with isopropyl alcohol and a cotton swab. I had this problem, and that’s what I did… after a couple of months, my FP3 charges correctly 98% of the time with the same charger and cable that didn’t charge before…