Thanks for the information provided to the Illustrator team.
We are able to reproduce this issue at our end and the engineering team is currently isolating this issue further to get to the root cause.
With Best Regards,
An error occurred while saving the commentLynette Perkins commented
I'm having this same issue in Photoshop! My computer was updated (8/2/18) and I am no longer able to use the space bar as automatic hand tool. Have spent hours trying to find a solution. Yes, I have shut down Safari and it still does not work. I REALLY need this function to work ASAP!! It's slowing down my work flow like crazy!! PLEASE HELP!