when i play 1080p movies (tested with *.mkv and *.iso), the GUI resolution is cut, doesnt proper shows the elements at the edges. the first two photos shows playing 1080p video. the last photo 4k. with 4k movies no issues.
further, the focused/selected item is more bright, in compare of none playback. the brigtness issue happens at every movie file.
KODI GUI is set as described in the LE wiki, including whitelist and refresh rate adjust.