Describe the bug
Media & text Reusable blocks preview should be display proper.

To reproduce
Steps to reproduce the behavior:

1. Open Editor'
2. Click on 'Add block option'
3. Add Media & text block.
4. Add Content in the Media & text block.
5. Then Add block to the reusable block.
6. See the Preview of Reusable Block,

Expected behavior
The preview should be display proper.

Please find below Video
https://www.screencast.com/t/kQ56g1hp