yep. pretty sorry....
i'm seeing now that, if i connect to the S22 U while it's unlocked, then navigate phone to lock screen settings, choosing 'screen lock type', 'smart lock', 'secure lock settings' will blank the display until you back out to the main 'lock screen' page...
i had removed updates to the 'Link to Windows' bit, as with previous comment, but don't see any way to do anything about the 'Link to Windows Service' either.
surely be interested in rolling back to the previous version, too.
Was about 10 days ago I first noticed the loss of a visible PIN keypad - probably coincidental with my upgrade to OneUI 5.1 and likely when the updated service was pushed on me.
I was running a November version of the Windows app - which had previously given me the remote PIN keypad. Then after the update the keypad was blank when trying to connect (but there was no "Unlock from your phone" message either).
In the settings>features on the Window's Phone Link app - you can disable hiding the screen on the phone and watch what's happening on it.
When I connected to the phone - the window on the PC was blank, while the phone displayed the PIN keypad. I could click inside the blank space on my PC - and a touch would register on the phone and I could unlock the phone with lucky-guess clicking.
I've let all the apps update - and got back the "unlock from your phone" screen on my PC - and confirm what you've seen once connected (the PIN keypads display blank on the PC)... but the keyboard still displays on the phone - and accepts clicks from your PC.
Through all of this, messages and notifications still came through as intended- only the remote control got fubar'd. For the most part, Smart Lock to location or a local device solves this, but it's not 100% YMMV.
Seems, we could downgrade to a November version of the Windows app (uninstall via Powershell - reinstall old version from UptoDown) - and rid the "Unlock from phone" screen... leaving a blank box on connect and overlaying a numeric keypad on our PCs screen to click the proper PIN key. 🙄
Cheers,
Chipster