Designer: Zooming is glitchy

Ignition 7.7.4
Windows 7 Home Premium 64 bit

When I use CTRL+Mouse Scroll to zoom in and out within a window design in designer, it is really glitchy, especially if I scroll quickly. I see flashes of different parts of the screen while i’m zooming, and if I scroll quickly, the zoom centre seems to move to the centre of the other parts of the screen that flash up…

See video of behaviour here (note position of cursor, and where I end up when I zoom quickly… it’s not in the same position on the screen):