Our company recently upgraded our instance to Winter 18 (We were on Sprint 16). We are experiencing dispatch console freezing when dragging / pulling the event window left or right, or dragging an assignment.
At first I thought this was a Chrome / Flash issue, but we are experiencing similar freezing in IE and Edge.
Not sure if this helps, but the freezing seems to happen more often with users that are downloading a large number of events within the dispatch console. For example, I as an Admin am not experiencing freezing as I download test events only.
Please advise on what you hear back from Support, as we likely won't see that update here.
I have Win 18' installed in one of my Sandboxes and as the only person in that Org testing I've not seen this occur in Chrome, and haven't tested yet in IE.
We had this same issue a couple months ago, triggered by the Winter 18 upgrade. Symptoms actually started with the DC loading blank. I had to delete an empty territory called "US" that was parent to our service regions for the country. It was just a container in nature. Once that was fixed, the DC would lock up for all users after a random amount of time. Certain things could speed it up like panning up/down/left/right in the Gantt view. Eventually support issued a patch and it fixed the problem for us.