Thank you for your post and screenshot.
I have not encountered this behavior, and I know that doesn't help you.
Do you have more than one FileMaker window open? Is this a Retina display? If you close the window and reopen, does the issue still occur? If so, if you quit and relaunch FileMaker Pro and open the file, does the issue still occur? I'm trying to narrow it down to memory, file, application, etc.
Any other information you can provide may be helpful.
I don't have retina on my mid-2011 macbook pro. I do use a second monitor that I connect via the adapter (VGA) so I have more real estate. I will keep an eye on whether it happens when I have this monitor hooked up.
Typically, if I encounter the condition, I close the window and reopen with a new one and go to the table and it gets fixed.
If I have more info, I will log it in here...
This is the bottom "add record" row of a table view.
If you go into layout mode, are the fields shown in grey present on the layout? Are the fields that are white not present on the layout? Or maybe the opposite?
I will check that suggestion if I encounter again...