wxPython / Wayland issues

Hello

I am writing a GUI application with wxPython, which uses a "main" 
window with all the controls, and some "secondary" windows where data 
gets plotted (using matplotlib). I am working mostly on GNOME/Xorg, but 
recently also was on GNOME/Wayland, where I observed a few issues with 
my application. I wonder if these issues are related to wxPython, 
Wayland, or both. Any thoughts or feedback would be welcome!

Specifically, the issues I am observing are:

(1) On Xorg, the windows get arranged nicely next to each other when 
the application starts. As long as the screen is not too small, they 
will not overlap each over.
On Wayland, the windows are just stacked onto each other, covering each 
other. One has to manually arrange the windows on the screen to avoid 
the overlaps. As far as I can tell, Wayland does not allow to 
programmatically position the windows on the screen. However, there 
must be somethings that I am missing, since the stacked windows are 
just a mess.

(2) If a long running task is started in my program, the task executes 
in a separate thread and a "Please Wait..." message is shown as a modal 
wx.Dialog (as a child of the "main" window). With Xorg, the user can 
move and resize the "main" and the "secondary" windows on the screen 
while the thread is running and the modal dialog is shown.
With Wayland, the windows cannot be moved or resized while the modal 
dialog is active.

(3) At startup, the application creates empty plot panels in the 
"secondary" windows. The plot panels get painted correctly on Xorg, but 
on Wayland some parts are just blank (usually about 20% on the bottom 
and about 20% on the right). Re-plotting or adding data to the plots 
does not update the blank parts. Moving the windows on the screen does 
trigger any update or re-painting. The only way to trigger a proper 
re-painting of the plot panels is to resize the windows.

Any insights would be greatly appreciated!

Matthias

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