I have a log file open in one tab (log.txt) that’s being periodically updated in the background. It is not the focused tab.
I have another file open (foo.txt) that’s not being periodically updated. This is the focused tab.
I’m scrolling around in the second tab (foo.txt) by holding the left mouse button and dragging either the preview pane or the vertical scroll bar. About every 5 seconds, I see a notification in the bottom bar that says log.txt got reloaded. At that time, Sublime forgets that I’m already holding left click and so scrolling just stops until I release & re-press the left mouse button.