Mine was stuck at 20%. Vertical didn't work. A factory reset helped for a while, but it got stuck again. Also, you can't do a factory reset from the menu unless you are over 30%. For a 2020 HD10, you turn off and then press off & vol. up to get a debug menu, where you can select factory reset with up/down and off. (found at [link|https://www.amazon.com/gp/help/customer/display.html?nodeId=GBMYCY5F7P7XFMWH&tag=ifixitam-20|https://www.amazon.com/gp/help/customer/...|new_window=true])
A couple of weeks later, it was stuck at 20% again. I went to the reset menu as above, but instead of factory reset I selected "Wipe Cache Partition." Now it is charging and I don't have to restore from backup and lose some stuff in my apps.