Desktop display randomly getting smaller and moving to the upper left of the screen.

Hi all.
I am hoping someone can shed some light on an issue I've been expierencing. I have scoured the web and have been unable to find much, if anything, in way of solutions. 
All little difficult to describe, but I will include a pic as well as a visual.
We are using some Q180's as media players for digital signage. For the most part they have all been working fine except for 2. Randomaly, the signage presentation will re-size itself and move into the upper left corner. This happens randomly and not at the same times each day. They are hooked up to a LED tv via HDMI. I have tried switiching the HDMI cables, ensuring all drivers are current and tried most all the basic troubleshooting. 
A simple re-start will get everything back looking and running fine. Again, this is a digital signage application so we cannot tell if this has occured until the client calls to let us know which is not good for us. 
I do apologize if this is not too clear of a description. Please refer to the image for a visual. Also, please feel free to ask me any questions you think may help you. 
Link to image
I appreciate your advice. 
Thanks!
Moderator comment: Image(s) >50KB converted to link(s). Community Rules.

Yes.. someone else!!
https://discussions.apple.com/message/23709687#23709687
https://discussions.apple.com/message/23743246#23743246
I found if you adjust the refresh rate (in display settings) then back again it stopps snapping.
Do you all have an AOC monitor connected by HDMI?

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