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 commentAnonymous commented
When I press the spacebar the hand tool flickers back and forth super rapidly alternating with whatever the main current tool is. This then makes it a crapshoot if when I click it uses the hand tool or the main tool. More or less making Illustrator completely unusable. Also happening on Photoshop. Only happened after CC 2019 updates. 2018 was fine.