This wording must have changed with Beta 2. While wirelessly charging under 50% battery it used to have the usual wording of “This update requires at least 50% battery or to be connected to a power source” even though technically it was charging.
They made it more clear now that it needs to be actually plugged in with an updated statement when wirelessly charging.
These Bugs, I Encountered these in iPad OS 13.1 Public Beta.
1 Control Center Menu
2 Dark Mode Menu/Activation
3 Suggestion Panel/ side lane Apps
4 Keyboard
5 Finger Print ID Scanner
6 Screen orientation like Rotation issues.