Navigator window not in sync with scroll on screen

I just noticed this.

But scrolling around with the navigator the map (smaller image, with the bigger view) doesn't always sync with what is showing on the screen.

A lot of piccies to show the problem.

I have tried to show as best I can without writing all over the screen. (That doesn't help)

And I save the piccies as PNG not JPG.

I've put a red box around the navigator's what you are looking at and pointed to the scroll (vertical) bar of the window.

Though they sort of line up, there are times when I am looking at a blank screen and the navigator says I should be looking at code.

The fan node I have shows up as dark green and in a couple of cases I point to it on the navigator window and where it is really (sometimes off the screen.)

I hope this is helpful.

Screenshot%20from%202019-04-16%2014-31-48 Screenshot%20from%202019-04-16%2014-32-06 Screenshot%20from%202019-04-16%2014-32-23