Command button font shrinking

Using Excel 2016 w/WIN10.

Coming from 2013 all my command button captions have started to shrink with use. Repeated use gets repeated shrinking to the point where I can no longer read the caption. (The code still works fine) Moving the position of the button restores original font size. Searching the MS community gets me answers (non of which work now) for a 2003 problem. I've tried changing autosize, and messing with the Height & Width properties and the end of the Sub. No help. I'm surprised searches continue to find resolutions from 2012 but nothing more current. Am I missing an update? To remove all possible interference I just a command button to a empty worksheet and started clicking and the font got smaller. It's gotta be me............any help would be much appreciated! Thanks, Kim

Thanks Jacc. From your link I can plainly see this has been going on for some time. I count myself very lucky I've only seen the problem since going to Office 2016.

Too bad MS is so slow on the issue. Thanks again, Kim