I just encountered this when booting my Pocket. Powering down and up again (HYPER+ENTER, 0/1) resolved the issue but it’s still strange.
I’ve seen this too a couple of time (since upgrade to rk3588?), also it not detecting the nmve drive (also before upgrade). Keyboard menu 0 + 1 always (sometimes a second try is needed) saves the day.
Ohh, that would explain that I sometimes don’t get the decryption password prompt (rebooting also helps there)
I also have this problem occasionally. Power off/on cycle helps, as you noted.
I’ve seen this on occasion as well, but I think it has been a while.