could not find solution, so posting my issue.

In my application I have set appearance mode to “System” and it loads correct theme but widgets have white background and corners.

Loading with different appearance mode

Mouse over fixes button text background, but not corners. I have implemented work around which fixes issue:

customtkinter.set_appearance_mode("System")
customtkinter.set_default_color_theme("blue")
customtkinter.set_appearance_mode("Dark")
customtkinter.set_appearance_mode("System")

it loads in different mode then switches to my desired “System”.

loads like this

I don’t like this approach and would like to understand and fix this issue. What could cause this issue?
Thank you.