Videos won't stop playing unless I quit the app

[u/hotinhawaii]

When I click to play a video on a post, the video plays. I can pause it. But when I go back to the feed, the video keeps playing again forever unless I quit the app. It will even continue playing if I open another video so that the audio from both videos plays at the same time. It's been happening for years. I have deleted the app and reinstalled but it doesn't help. I am using the app on ios.