Richtext validation does not work when publishing with missing ezlocation URL.

Steps:

1. Create new Article (or another ContentType object which has RichText filed) for e.g. Article A,
2. Create the second content object, for e.g. Article B. Let's assume, that this article has LocationId 63.
3. Edit Article A, in RichText editor, add some paragraph with text, select few words and click on add URL button. Then, click on Select content, select Article B, then Save URL and publish content.
4. Move Article B to trash.
5. Edit Article A.
6. Save draft. [Works correctly, validation error is displayed on richtext field]
7. Try to Publish.

Issue: Validation error is NOT displayed on richtext field, error occurs in UI " The content cannot be published (Connection error : 400.)"