Instagram jumps to a different post

When a friend texts me a link to an Instagram post and I follow the link, the video will start to play and then after 1-2 it will jump to a different, unrelated, post. I can use the back arrow to get back to the original post, but it's annoying to do that all the time. Is there a way to stop it from jumping?

The Instagram app is current, and I'm using an iPhone 12 mini with the most recent iOS.