clips glitch after pre composing

Hello, im a new user of after effects and i havent figure out all of the tools on it. i use after effects 2021. Could someone please help me because after precomposing, few of my clips glitched out of nowhere. But i made another video with the same clip, they were fine. Ive tried changing the fps a few times but it doesnt change anything. Is it a motion blur problem or frame blending problem?