Strangely, I can't see any loose connections when wiggling the cable (although the connection does get dropped when the cable is in certain positions). I'm wondering if this could be a software issue as well as a hardware issue, as in it's not keeping track of the actual charge correctly. I managed to really quickly charge it from 30% to 90+%, had dinner, came back to the charging tablet, and suddenly the charge was way down to 54% again, and going down fast. The device doesn't heat up, either, so it probably isn't caused by the CPUs going berserk. I'll order a new charging port regardless, but the way it's looking right now, I don't know if it'll solve anything.

Did you have issues similar to what I described above? I really hope it's just this one component that's broken.

Thanks for mentioning this. Luckily I don't have an SD card inserted with 64GB of storage already there, but I would absolutely have forgotten all about it if I did.