I have this problem as well.
If I change the size with shortcode it’ll work, but I’d like to not have to resort to that for every post.
It still isn’t working.
Anyone else have any advice?
I’m definitely not putting it in the visual bit, I’m not that halfwit.
I never thought of doing a custom page template, though…
Is there any other reason why it would strip out that one line?
Apparently resetting the browser (testing with Firefox) also solves the issue.