on 14/10/2020, Dave Liquorice supposed :
My Android 7.1.2 (Linage) on a Samsung SIII Mini just needs a short
quickish swipe up from the padlock to bring up the pattern
recognition unlock screen. But is also happy with a longer slow swipe
as well.

I tried that, no luck at all - with a slow swipe up, the display of
time and date gradually reduce in size, so it must be seeing my swipe.
I have tried circles, left swipes, right swipes. The only way I can get
it to unlock, is with the high speed bottom to top, or double clicking
a notification, when there is one on the screen.

I guess it must be the implementation combined with the slightly weird
NOOK hardware.