Subtitle not in sync

Hi, I have sometimes problem with the subtitle file wont run in sync with the movie. That happens when i watch a movie or TV-serie that not have subtitle from the start or wrong language.
So sometimes when I download the subtitle I want it is not in sync. And it is not possible to adjust with the subtitle offset adjustment as well in Kodi because it look like the speed is changing all the time.
Maybe I find the correct offset in the beginning of the movies and the 5 minutes later it is out of sync again.
Is it something I can change in the settings? Is it depending on how many frames per second?

The TV serie Red Eye I am watching currently has this FPS if that matters: 1920×1080 H.264 25FPS @ ~4342 kb/s ?

I have the latest Kodi and also the latest Windows 11.