When making a flutter app for Linux, the initial size can be set by altering the parameters of gtk_window_set_default_size() in my_application.cc:
gtk_window_set_default_size(window, 450, 750);

Then trying to set maximum and minimum sizes using the window_size plugin in dart code using the same dimensions:

final fixedSize = Size(450, 750);
setWindowMinSize(fixedSize);
setWindowMaxSize(fixedSize);

However when setting this maximum and minimum the window is resized to below the size set initially in the native code using GTK, despite using the same dimensions. Wouldn't the expected behaviour be for the app not to change size at all?