Hi. This problem has been bothering me for more than a year. After cutting, the video file becomes with an extremely high frame rate. Technically, it's still the same 24 fps, but more is displayed in the file data, for example via MediaInfo. Much more. If you cut some ~70GB 4K HDR file, then from 24 fps it will turn into about ~5000 fps. If the files are lighter, 5GB 1080p for example, then there it rises to ~800 fps. In a number of players, this causes playback problems, so after cropping I have to convert them to MKVToolNix.