A small bar on the left and top of the applications is present and whilst not a big deal, was annoying for users. I have shown this in the following screenshot, notice the black bar on the top and left of the window.
This issue was flagged as a bug in Server 2016. Microsoft released the fix under KB4013429 along with a whole lot of other updates.
The patch can be downloaded from here:
After installing this patch and rebooting the server, the users will not longer experience this issue.
Hope this post has been helpful.