Editor elements twitching when publishing

Hello,

I’m having problems with the editor. When publishing the layout changes.
See the following link: Loom | Free Screen & Video Recording Software | Loom

Hopefully, someone recognizes this problem.

I’m using flexbox. The image is inside a div, with the following css:

display:flex
flex-layout: horizontal
justify: space-between
align: center
height: 100vh
float:none
clear:none
overflow:visible
position:auto

The image itself has the following css:

shrink if needed
padding:13px;
max-width:100%;
max-height:100%;
clear:none;
overflow:visible;
position:auto;

Thank you very much.