Video variable html mismatch issue

Sometimes, when a video is selected as a variable, upon trying to save the new version of the variable, Visiopt can throw the HTML mismatch validation error:

This happens because the selected variable is a <video> element, but upon save, there is a <div> element in the HTML content too

Looks like this:

The <div> element is being injected dynamically by Chrome extension named "Video speed controller" used to speed up or slow down videos:

 

To fix the issue, please disable the extension while working on the test setup!