Never tried YouTube on the Pro1X so had to enable it first, the apps does not seem to work that well, so did not try different keyboard-drivers, just killed the app...
But launching Yotube in FF it does respect Esc to exit full screen mode - so just a poor aspect of the app I guess,
The polarity on that one seems to be inverted with respect to the Pro1-X's ribbon cable (compare the labels P+/P- with those from @Whitey's picture).
Everyone, be sure to always connect your charger in the right way ("+ to +, - to -"). Otherwise bad things may happen.
Some other candidates:
VIVO B-N8
XlAOMl BM4E M1805E10A, Poco F1 Armoured Edition Globa, Poco F1 Armoured Edition Globa, Pocophone Poco F1:
Infinix Smart, X5010:
9 Pro, M2003J6B1I, M2003J6B2G, 9 Pro Max:
David
As @Sean McCreary clarified in the LOS 20 thread, off-mode-charging cannot actually protect you from the battery-depletion-bug.
The Pro1X's (and likely any other Android devices's) charging is controlled by the OS in all cases. Seemingly, this means that some minimal amount of battery-charge is always required to boot the OS to the level where power-supply can be actively handed-over to a USB-connected PSU - irrespective of whether only the "charging screen" is loaded, or the full Android/Lineage GUI. Do not ask me why things are designed this insane way. It just seems to be the reality