Sorry to hear about this.
It is nothing that I have see or heard of before.
Could you make us a quick screen capture video and also send us with the files to duplicate this? We need a set of simple files that will show is this behavior on our lab computers.
Instead of a video, we could also arrange a TeamView session, so you can share your computer and show me how you duplicate this issue on your computer.
If this is better for you, email me firstname.lastname@example.org and we can set up a time and good number to reach you at.
Looking forward to getting this solved.
Thanks for your help.