[Samsung Galaxy S10 Themes, Apps, and Mods] S10Guest:
Figured I'd add some settings that I'm using that may contribute to these issues (or not): S10+ (not sure if its + specific), fingerprint/pin unlock, glance/lockscreen and aod set to show bare minimal information if woken by someone other than me (just notification app name shows, everything else will show 'content hidden' -until unlock)

Turned screen off ...

Sent 4 notifications as a test (signal, messages, missed call, and gmail)

Disappearing and/or missing notifications seems resolved using initial default options install (only setting I change is blink for all display modes, using .51 helper)

Apps such as Signal (which don't wake the glance/lock screen for a couple seconds when received) now show when it's the first notification received, along with the other 3 above, wash, rinse, repeat. Seems to be working default.

One observation: Not sure if it was doing this in .65 -nolowcpu- because I wasn't paying this close attention, but I notice a small pause in the notification color cycle if you unlock phone and re-lock phone without clearing the 4 test notifications sent, as if the counter restarts and shows one extra blink of the current displayed color at the time of lock, and then the cycle goes normally through all 4 colors after that ex. if its blinking blue/red/green/yellow (repeat) and I unlock and re-lock it when its showing blue it will show blue(verytinypause),blue/red/green/yellow -- and continues normally after that stutter (not a big deal, but my eye catches that color cycle stutter) other than that, working normally.

now I test the 'On timeout' options - still bugs :)

Set 'Battery: Screen on' to 5 seconds ..

^this setting works fine when screen is on. Notifications show up and then vanish after timeout setting...

Turned screen off..

Sent 2 test notifications... (signal, gmail) -these don't wake the glance/lock screen and work at first

^as soon as I unlock the phone at this point, the 'On timeout' applies and notifications are dismissed (similar as if I had used the 'After unlock' option, which is not checked at this time) - assume these notifications should persist - but maybe its by design that On timeout overrides After unlock?

more testing.. screen off..

Sent 4 test notifications ... Signal and Gmail come through fine .. as soon as Messages or Missed Call notification come they wake the glance/lockscreen and I believe On timeout activates and clears whatever is there away .. and you are left with just a blinking blue notification (messages) or blinking green (missed call) or after one test I believe there was nothing as all 3+missed call came in at once, lol.

So TLDR; all notifications come in now, but On timeout option when activated is not playing nice

(waking of the glance/lockscreen by missed call, default messages, app that wakes glance/lockscreen, or actual received/answered call while notifications present activates On timeout and dismisses preexisting notifications)

-could be the low timeout of 5 seconds I use to test, but it's the one that brings the issues out quickly - will test again with a higher timeout and report back

---------- Post added at 01:25 AM ---------- Previous post was at 01:02 AM ----------

still weirdness, works a little better with a higher timeout, sent 4 notifications, and when I double tapped to see the glance screen, they all went away except gmail, then the second time i double tapped a few seconds later, gmail went away..

On timeout definitely activating on glance/lockscreen wake and timer starts its countdown.

just realized I set it to 60 seconds, and 60 seconds passed for the most recent gmail notification and then it went bye bye.

Second test- sent signal (no wake) and then gmail (no wake)-for some reason this time gmail didn't show up.. double tapped to see glance/lockscreen, then signal notification disappeared and only gmail showed with screen off. On timeout is the culprit, if its off - everything works