I have upgraded to Kodi 19 with the “Reset Kodi on next reboot” executed. After finishing the install I am experiencing the same 2 issues on two different devices.
The first issue is screen flickering when ever I move around the menus; it is resolved by going to Settings - System - Display and changing the Resolution or Refresh rate, and then not accepting the changes (just to force a refresh?).
The second issue is the screen does not recover from the screen save, if set to either Black or Dim. I hear the navigation sounds, but am forced to hard reboot the device to get the display back.
Not sure if these are known issues or new. Please let me know if a log would help identify, and I will upload.