The splash screen is broken. It shows the same “damage” on every boot, and it's been like that since at least LE11
That's the Kodi Omega (21) splash screen. The glitches are intentional and part of the splash. Kodi Piers (22) moves back to a more normal one.
If you are using "adjust refresh" in Kodi config so it switches mode to match the media being played can you disable that and force all media to 1080@60. If you are not using that, please enable that and define 1080@60/59.94/50/24/23.976 modes and allow mode doubling. Do the changes make any improvement?