Fixed Width table displays strange behaviors in the editor for Blog post

Description:

1. When inserting a table with "Fixed Width" into a blog post, in editor mode, there a few strange behaviors
2. First, after inserting the table and setting it to "Fixed Width" and adjusting it, we are unable to type anything unless we click around a little.
3. Next, if we were to add another table with "Fixed Width", just moving the cursor around seems to add line breaks into the page.
4. Publishing the page makes the space goes away.

Steps to reproduce issue:

1. Add a new blogpost
2. add a table with 2 lines three columns (or whatever you feel like i tried different numbers out)
3. set it to fixed width (changing the width is not necessary but I did it in the screencast I took and attached to the bug ticket)
4. add another table underneath it
5. move the mouse curser over the first table and just move it around there a little
6. watch in awe when line breaks mysteriously are added to the page

Expected:

1. Fixed width table in blog post should work like normal, like on a standard page.

Actual:

1. Same as issue description.

Video from customer

screencast-wiki.com-2018.08.08-16-17-40.webm