When I start RStudio everything works as expected. But often during a session the behavior of the GUI changes so that if I mouseover the scrollbar for the source pane (no clicking), then the position of the view in the source pain jumps as though I had clicked on the scroll bar. This is highly frustrating as it makes it very difficult to move the mouse between the source pane and the console without loosing my place in the source. The only solution I've found is to restart RStudio. Is this a setting somewhere that I may be inadvertently triggering with a hotkey or something? I never want this behavior and if it's possible to permanently turn it off, that woud be ideal.
I have seen two other posts on this question, but neither appears to have been answered, so I'm trying again.