Youtube BBCode Problem

Technical Details

Forum version : #phpBB3
Position : Founder
Concerned browser(s) : Google Chrome
Screenshot of problem : https://i.imgur.com/spzlKfv.png  https://i.imgur.com/TZGFeDL.png
Who the problem concerns : Yourself
When the problem appeared : I notice the problem start to occur when whenever a user posted. In his sig he had a Youtube BBCode.
Forum link : http://yangzingacademy.forumotion.com/

Description of problem

I am having a problem on my forum. Whenever there are multiple posts that contain the Youtube BBCode, the pop-up chat and the search bar on the top always seem to bug out and move when I scroll through the page. I'm at 90% Zoom, but I don't think that has anything to do with the problem because at 100% I am getting the same problem.

Could you please post a link to a topic that has Youtube videos that guests can see?

http://yangzingacademy.forumotion.com/t106-what-re-you-listening-to there you go!

What do you mean by move?  As a guest, everything looks normal.

I'm referring to scrolling down the page. Heres another example of what happens when I scroll down the page. https://i.imgur.com/nh2dDgH.png

It does what it does on the support forum for me when I visit your forum as a guest.  Are you referring to the search bar in the toolbar?

Yes I am refering to the search bar.

It looks and acts normal to me when I visit that topic.

I did say that the problem was probably only happening to me. I asked some other people on the forum and they also state that its not happening to them.

Have you tried other browsers?  I notice in your profile you have Chrome.