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2024-01-04 21:02:24.436 T:1566 info <general>: [WHITELIST] Searching the whitelist for: width: 1280, height: 720, fps: 25.000, 3D: false
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] Using the default whitelist because the user whitelist is empty
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] Searching for an exact resolution with an exact refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] No match for an exact resolution with an exact refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] Searching for an exact resolution with double the refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] No match for an exact resolution with double the refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] Searching for an exact resolution with a 3:2 pulldown refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] No match for a resolution with a 3:2 pulldown refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] Searching for a desktop resolution with an exact refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] No match for a desktop resolution with an exact refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] Searching for a desktop resolution with double the refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] No match for a desktop resolution with double the refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] Searching for a desktop resolution with a 3:2 pulldown refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] No match for a desktop resolution with a 3:2 pulldown refresh rate
2024-01-04 21:02:24.436 T:1566 debug <general>: [WHITELIST] No resolution matched
2024-01-04 21:02:24.436 T:1566 info <general>: Display resolution ADJUST : 3840x2160 @ 30.000000 Hz (16) (weight: 0.000)
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^ that's the current whitelist decision tree outcome. Kodi will handle scaling 720p content to 2160p without trouble but I'd expect playing 25fps content at 30fps to result in visible glitches. It also looks like you have a 4K desktop resolution?
This article contains general advice for better GUI and playback experience: https://wiki.libreelec.tv/configuration/4k-hdr