Why does my A34 5G frame rate drop when viewing 4K videos

[yug2006]

My new A34 5G frame rate drops from 60 ish to 30 hz when viewing 4K videos. When I downscale the viewing quality the video runs 60+fps fine, it's just when viewing specifically 4K videos? I have also cleared/optimised my RAM, and the prob still persitis. Any ideas on how to fix?

[Aaron Gartwelve]

Same with my Samsung A34 5G, when I make a video call the refresh rate drops to 60 hz instead of staying at 120 hz, how can I fix it?