Thanks for taking a look and the detailed explanation! I’d taken a look in the documentation in my local copy of the VST3 SDK, but hadn’t been able to find that diagram - super helpful.
Additionally, thanks for submitting the report to Ableton.
I’ll note that Cubase 14 seems to have a related issue. When clicking “Expand”, the viewport only expands to the maximum height that would fit on screen, and the UI will draw off the bottom of the viewport. Definitely a much less noticeable issue, but still perhaps worth opening a bug report with Steinberg? They don’t appear to call checkSizeConstraint() at all.
