Embeds cause threads to move making it difficult to read

[markymids]

I've noticed that if I go on to a thread that has twitter/instagram embeds with videos in them, the embed size seems to be larger than it needs to be & then it slowly decreases in size, this causes the page to keep scrolling up which is very annoying when you're trying to read a comment & it keeps moving!

I seem to get it most often when trying to read threads on a mobile device (iPhone/Safari). Happens on the standard theme as well as my custom theme.