The PC is custom made. Forgot to mention that in my previous post. I can post the hardware in the computer if you think that would help narrow it down, but I've been running it for more than a year without this problem.
I've noticed it seems to be there after I stop using the computer or walk away from my desk for a little bit. I don't have a screen saver set. I do have my power settings set so that my PC never goes to sleep, but my screens turn off after 10 minutes. I have come back to my PC before the screens turn off and the menu be there when it wasn't when I walked away. I've also come back to the screens being off and the menu be there when they wake back up. Not sure if that info helps make any sense of it, but its something I've started to notice. I don't think I have actually seen it ever pop up while I was looking at the screen...
Screen shot of the settings bar that pops up when I click on Settings in the window.
Screen Shot of the Windows 10 Store Library
FYI... I just uninstalled Twitter, Duplicate Cleaner Free, HP Smart, and Toshiba Print Experience from the Microsoft store. Didn't need them or use them anymore. I'm going to restart my PC and I'll update later if uninstalling any of those got rid of the issue.