From time to time the Move dialogue box will not show up when called using the hotkey Shift-Command-M. InDesign then thinks a dialogue box is open and will not perform other tasks. You cannot exit the phantom dialogue box with escape. You cannot save your document. You cannot quit InDesign without manually force quitting.

I am on Mac High-Sierra OS 10.13.1 (17B1003) and the latest Creative Cloud version of InDesign. I have had this happen on multiple computers and on multiple versions of InDesign.

I do not have multiple monitors - however, I do use the Spaces function on the Mac OS and have multiple desktop spaces set up. I have tried passing through each of these to try and find the box and close it using escape, but it does not work.

This problem does not happen all of the time, however seems to trigger when using the Move dialogue frequently in a fast-paced work environment.