OK I sussed it out. It's not when I single click the buttons it's when I double click anywhere in the window.
Deselecting 'Double click a windows title bar' in Dock Preferences stops it from happenning.
....but it happens when I click anywhere in the window :/
jersmi, I just uploaded a version of the composition with the corrected Wing URL. I'm not sure what would have caused the site to keep asking you to log in or to ignore your new upload, but if it happens again, please file a bug report and we'll look into it.
Although you shouldn't need to change the file name when re-uploading to avoid duplicates, since the website does this automatically, adding a version number as Bodysoulspirit suggested is not a bad idea to help keep track of the different versions.
Joe — I wasn't able to reproduce the unexpected maximizing/minimizing. You don't by any chance have a special window manager installed, do you? If it continues to be a problem, please create a separate bug report.
Just tested this on a 2015 MBP with the Intel Iris Pro, 1536 MB GPU, running MacOS 10.14.5, it seems like that GPU has the same issues as the Intel HD 4000 with (Divide, Facet, Quantize, Trim).
This composition crashed a few times at first and then showed no output, I removed facetize and it worked as expected.