Please go to the Word menu and check to see if you have version 14.7.7. If you are behind on updates, please install updates and test again. If you have 14.7.7 there's nothing more you can do. Office 2011 is discontinued and will not be updated in the future.
I just tested in Word 2016, and the cursor does not disappear (using High Sierra).
Make sure your Mac has a working internet connection before checking for updates. Install Mac OS X updates followed by Office updates.
Install Mac OS X updates first:
To get Mac OS updates, go to the App store on your dock, and then click the Updates button to reveal available updates.
Then Install Office Updates
To get the update:
1. Open any Office application:
3. Make sure your Mac has a working internet connection
4. Go to the Help menu and choose Check for Updates
5. Let AutoUpdate check for and install updates
6. Restart your Mac
Be sure to include the version number and OS version when asking your question.
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