Why does my feed start over?

IDK if anyone else is experiencing this, but I'll watch Tiktok for a while, like 10s of videos and then it will randomly go back to the first video that appeared when I opened the app. My feed will like start over. I have to scroll all the way back to get to where I was. Is there a way I can fix this or is this a glitch I just have to deal with? Any help would be appreciated.