Bug 428592

SUMMARY

Night color is set to something like start at 8:15 PM and be fully dimmed by 11:30 PM, then start coming back on at 4AM (until after 6AM.)  Then the users are seen at midday or early afternoon with full night colour still on, looking like they are suffering (because don't know what a system tray is.)

STEPS TO REPRODUCE
1. Set users' night colour to something normal like starts at 8:15 PM and finishes dimming before midnight (don't need to set eight hours ahead like the bug on 5.19.4.)
2. Let them use night colour.
3. Find out it's still running the next afternoon.

OBSERVED RESULT

Night colour is seen running (even at full 1000K dim) but when you hover over it, it says it's not running. (I have seen this just after some hours after it dimmed: about midnight, claimed it's not running anymore, but is, at full 1000K dim, other than the icon looks like it isn't running or maybe even disappeared.)

EXPECTED RESULT

Don't just decide it's not running.  Run, dim, finish dimming, wait, undim, finish undimming, and restart next 'evening' (or whatever sequence; don't assume it will be started at daytime UTC or the user isn't on night shift.)

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Neon 20.04/5.20.2
(available in About System)
KDE Plasma Version: 5.20.2
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1

ADDITIONAL INFORMATION

Used to work fine a few weeks/months ago on Neon, undimming fine in early-to-mid morning.