Movies freeze for 20 secs every few minutes

Hello there,
I encounter a strange problem with 3/40 4K movies (Super Mario Bros (2023),Fear and Loathing in LV, and Thelma & Louise). They play for several minutes then freeze for 30 seconds, and repeat all way to the end of the movie
I mainly use the Nvidia Shield (2019 model, Ethernet, gigabit speed) 
I tested the movies on the 4K Apple TV (Ethernet) on the Plex and Infuse app, no problem.
Plex app on the Shield, no problem.
VLC on my Mac, no problem.
I tried the discs on my Ub820 bluray player, no problem.
Subtitle on/off doesn’t make a difference.
Kodi 21.1 Omega, am I missing something?
The Kodi app has been deleted and reinstalled twice.
Im a new Kodi user.
Thanks
The movies are DoVi P7 HVEC(mkv).
I use the Kodi app because of the subtitle luminance is better (but I wish there is a subtitle luminance control like the Panny UB820 player).
(I originally used PM4K add-on)
UPDATE:
I tried the PKC add-on , same problem. So it’s the player problem, another 37 movies play fine.