Last one "March 1, Security update" was totally fine, now my always on display doesn't work, it only shows first clock and info after closing case, then nothing - black screen, no more. Tried many solutions, I know about changing in options from tap two times, to show always on, etc., made topic on reddit, people getting same issue. I encourage you to read, what I've tried and to discussion.
Hi, I'm having the same issue. No clock on case cover showing after April 1, 2019 update.
Have tried all the usual from toggling settings to reboot, even removing and replacing phone in case and all of the above in different combinations just for good measure without success.
This has happened after previous updates so definitely software issue - in the past AOD COVER display has resumed by itself within a few hours post update. However not this time...
Would really appreciate if anyone has found solution or advice (note I have tried all the settings).