Block preview does not match edit mode view after saving draft.

Steps:
1. Install ezstudio (w/o demo) from 1.4.0 tag (or 1.3.1/1.3.0).
2. Create a new Landing Page.
3. Add e.g. Tag block.
4. Add content: <p>Lorem ipsum dolor sit amet</p>
5. Publish the new LP.
6. Switch to edit mode.
7. Modify content to e.g.: <p>Lorem ipsum</p>
8. Click Save draft.
9. Switch to view mode.

10. Click the Versions button.
11. Click Edit on the versions pop-up for the new draft.
12. Verify content of tag block. [OK, 2 words are displayed]
13. Switch to view mode.
14. Click the Versions button.
15. Click Preview on the versions pop-up for the new draft.
16. Verify content of tag block (in preview). [NOK, 5 words are displayed]

Remarks: Occurs also for other blocks e.g. Embed, Banner.
Occurs also when Publishing in step 8 instead of saving draft.