Has anyone experienced or seen missing buttons in the IE browser?

1. The user is part of a group and is the only one experiencing the problem.
2. The IE is version 11
3. The operating system ranges from Windows 7 to Windows 10
4. The buttons are outlined, but there is no function.
5. The issue started showing up this month.
6. We are getting more reports of this in the field.

The work Around:
1. We have them use Chrome.