macOS window maximization weirdness

[Paul Dupuis]

I have a standalone, built with Livecode 9.6.11 STABLE, where for some 
windows (stacks) on certain macOS versions, maximizing the window 
results in no controls being drawn or most controls being drawn incorrectly.

It is not every resizable window (stack) in my app, just some. It is not 
every version of macOS, just some. For example, on macOS Sonoma, the 
offending windows (again, a subset of all my app's resizable windows) 
work fine. On Mojave, they do not.

On Windows, they all work fine when maximized (meaning they are all 
rendered as expected). On macOS and Windows, they all RESIZE (i.e. user 
window resizing) correctly. It is only certain windows AND only on 
certain versions of macOS, and only when maximized (using the titlebar 
green maximize circular icon). In fact. you can RESIZE the window 
manually on macOS Sonoma or Mojave up to the working area of the screen 
(all so the full screen except the menubar) and they all render 
correctly. It is just the "full screen" maximize Apple now does where it 
hides the window's titlebar until you hover over where it would be that 
have a problem and, again, just for certain windows on certain versions 
of macOS.

I'm baffled as the resizeStack handlers are the same across platforms 
(macOS and Windows). There is NOT platform specific code in the 
resizeStack handlers and, I believe, that when a window is maximized, 
Livecode just sends a resizeStack message.

Has anyone seen or heard of any weirdness like this?

I do not have a whole set of macOS version to test on. Sonoma and Mojave 
are about it. I can compare the resizeStack handlers for the stacks that 
maximize correctly with those that don't to see if there is some issue, 
but they all work correctly on Windows and work correctly when manually 
resized.