If you're using InDesign CC2015.1 (the latest version) with El Capitan, unticked "Automatically hide and show menu bar" in El Capitan System Preferences under the General Tab?
Hello Derek, thank you very much, but I do use osx 10.9.4. Now I switched off "Automatically hide and show menu bar". Maybe this will help. ? I will try. Thank you.
This menu facility is only available with OS version 10.11 (El Capitan) so this won't help!
I suggest you trash your InDesign Preferences to see if this helps: Troubleshooting 101: Replace, or "trash" your InDesign preferences