issue with empty

[UpD]

clicking the "share" button with url section empty gives empty post that can't be erased.
once clicking "erase" button of the empty post erases it just once. Then Clicking browser's "refresh" button empty post comes back!
example:
leave the url section empty & click on "share" button. An empty section appears on the feed. Erase that post, then post is erased. Now refresh the page, that post comes back.

Any post can be erased, but when it's empty, you cannot erase it...

How can we fix that??