Hi Kwiboo: Here are some things I experienced with your latest release on my rock64:
1. For me CEC Support doesn't work with (rock64). The message says CEC is connected but the Remote doesn't work. I switched (clean install) from an old Raybuntu-Release, CEC worked flawlessly there.
2. My USB-Keyboard only woks, if I reconnect it after Kodi finished launching.
3. Videoplayer: All tested files below 4k resolution play but the player crashes/hangs after skipping forward.
4. Videoplayer: 4k HDR movies don't even start... some freeze Kodi immediately after selecting them, others show the "working wheel" but nothing happens. No Problems here with s905x or C2 here.
All Video-Modes are whitelisted.