I have just upgraded from 5.26 to 5.27.2 and now the screen is flickering (horizontally up and down for 1 or 2 pixels ) in the main menu and also in the games I run.
The resolution the TV shows is 1080i 60Hz
When I start Kodi the flickering disappears and everythings is ok. But when I switch back or reboot to Batocera it is there again.
It‘s like the picture is displayed 30 times a second (30 Hz) 1 or 2 pixel different from the other 30 times (Hz) it is displayed (=60 Hz). But since it worked before I think there could be a setting to achieve a stable picture.