In order to reproduce the issue we sent information to all the affected users who have either voted or commented on this thread.
Based on the replies we got we could infer that the issue is occurring when a third party software or application is also running in parallel. Some examples of the software used include Global Auto-correct, Google Chrome,
Moreover, when the issue occurs it seems to hamper all CC applications such as Illustrator, InDesign and Photoshop.
A possible fix for the solution includes restarting the application or restarting the system.
In the absence of any consistent reproducible steps, we are currently closing this thread as “not reproducible”. In case you again encounter the issue, please create a new thread mentioning the steps with which we can reproduce the issue and additional softwares, if in case any, that you are using.
InDesign TeamWill Steuber commented
Spacebar hand tool and command+shift for zoom still do not work for me either. I shut down all applications, restart and it still doesn't work on my Adobe applications. I use these shortcuts constantly and this is really dragging me down. I'm running Mac OS 10.12.6 and CC 2019. Any suggestions? Very frustrating!