TYPO3 Core

I cannot reproduce this! have you a printscreen? how to reproduce this? witch TYPO3 7 version do you use?

I have a different behavior with the "Language mode" (7.6.1-dev (latest master)) when you have a very long string... it does not overlap other elements, but the container is stretched very far.

How to reproduce:

1) create HTML content element (Fluid content element)
2) type in some CSS with a base-64 encoded image

<style>
p{
  background:url('data:image/png;base64,vhateververyveryveryveryverylongstring');
}
</style>

3) Result in language mode: see attached screenshot

please note that in columns mode this does not happen, the text flows in vertical