The behavior differences you've observed give a clear indication that the issue is specific to your work machine and that either NVDA, Office, or some setting is at play. Since uninstalling and reinstalling both NVDA and MS-Office are very easy to do (or should be for your IT folks) that's the first thing I'd try. Do one or the other first, see if that clears things up, then do the other if the first didn't get the hoped for result.
Also, since you haven't mentioned it, are both machines running the same Windows release (e.g., 7, 8.1, 10) and, if Windows 10, the same version and build?
Brian - Windows 10 Home, 64-Bit, Version 1809, Build 17763
A great deal of intelligence can be invested in ignorance when the need for illusion is deep.
~ Saul Bellow, To Jerusalem and Back