I;m not sure of the steps to reproduce the issue.
On occasion, it seems like the mouse stays selected in one of the views, such as the tree or dopesheet. What I mean is, when I try to right click or use the mouse scroll button to zoom in or out, it only reacts to the tree or dopesheet. I am right clicking within the main view area and I am not able to move the view around.
Restarting Spine seems to fix the issue. I don't know what causes the issue to occur, it just seems to happen randomly at some point during my workflow.
I have the latest version of spine and I am working on a PC laptop running Windows 8.1.
I am working from home today and my computer is running windows 8.1, but when I normally work at my office, I am on a PC that is running Windows 7, and I have never encountered this problem. This makes me suspect that it might be a windows 8.1 issue possibly?