Windows 11 - System Tray Icons Disapper For No Reason

my issue was: system tray and time dissapear after shut down; every night i couldn't hibernate too, my screen goes black and after several seconds on again; i shut down and no tray and time gone. i think hibernation and disapearing were related in my case. i had found a fix, i used it every time after power on, i prefer to automatically hide the taskbar, and i every time go to the settings and uncheck this setting and check again, system tray and time is back, but hibernation not fixed. after several months i decided to play more with settings and first try was successfull, you have to check and enable the setting 'select the far corner of the taskbar to show desktop' in taskbar settings. my both issues, system tray and hibernation were fixed immediately and permanent. try it yourself, check or uncheck and check, and may be helpful.