Well hopefully it gets fixed at some point, but there is some debate over whether to stick with this type of window title bar or not, so I can’t say for sure. All I do know is that the bar doesn’t seem like something we have any control over.
As for the video link, I don’t seem to have access to that, or maybe I need a Google account. I’ve updated your account status so you can embed images and videos to your posts though, so if it is small enough you can drag the video into the response area to attach it, or click the upload button (looks like an arrow pointing up, in the toolbar).
But could you describe the circumstances where it occurs? I don’t see any jumping around in my testing, save for one understandable condition: when adding notes left or upward of the top left area. Since that is where Scapple measures everything from, adding material in that direction requires redefining where 0,0 is, and that moves the texture’s origin point as well.
You might also check the beta version to see if there is any difference in behaviour. We haven’t changed anything directly related to that, but it is a near complete rewrite in Swift, so who’s to say! It does also fix a number of other bugs, and there is nothing major on the known-issues list at this time, so it’s not a bad replacement for the official stable version.