Scapple diagrams jump when the diagram loses focus

I’m using version 1.3.1. It often happens that, if I move the diagram up or down and then change app focus or move my cursor to the Scapple menu bar, the diagram jumps back to where it was before I moved it, as in the this animated GIF:

Would you say this happens more or less often when using tabbed windows, as shown in the GIF? I haven’t seen anything like that myself, nor could I get it to happen with a few tests, but I don’t often use tabs and my quick testing with them enabled might not have been enough.

Also what method are you using to scroll, just the mouse wheel or trackpad scroll?