Setting override_text_color, font sizes in run_native() does not work on Windows

[barries]

Describe the bug
Changing at least some style members in eframe::run_native()'s app_creator callback works fine under Linux, but seems to have no effect in Windows. Repro code with workaround below.

To Reproduce
Steps to reproduce the behavior:

1. Set override_text_color or text_styles's font_id.sizes in eframe::run_native()'s app_creator callback.
2. Run on Linux
3. See correct colors and sizes
4. Run on Windows
5. See incorrect colors and sizes
6. Add workaround shown below
7. Run on Windows
8. See correct colors and sizes

Expected behavior

See the style changes on Windows.

Desktop (please complete the following information):

• OS: Ubuntu 22.04 and Windows 11 Pro
• egui / eframe: 0.31.0

Additional context

impl LogViewerApp {
    ...
    pub fn run(self) -> eframe::Result {
        let native_options = eframe::NativeOptions {
            ...
        };

        eframe::run_native(
            "LogViewer",
            native_options,
            Box::new(|cc| {
                setup_custom_fonts(&cc.egui_ctx);
                cc.egui_ctx.style_mut(|style| { // This doesn't work on Windows. For example, override_text_color is None in update().
                    style.visuals = Visuals {
                        override_text_color: Some(TEXT_COLOR),
                        window_fill:         Color32::WHITE,
                        panel_fill:          Color32::WHITE,
                        ..Visuals::light()
                    };
                    for (_, font_id) in &mut style.text_styles {
                        font_id.size = 16.0;
                    }
                });
                Ok(Box::new(self))
            }),
        )
    }
}

impl eframe::App for LogViewerApp {
    fn update(&mut self, ctx: &Context, frame: &mut eframe::Frame) {
        ctx.style_mut(|style| { // Workaround for the above code not working on Windows
            style.visuals = Visuals {
                override_text_color: Some(TEXT_COLOR),
                window_fill:         Color32::WHITE,
                panel_fill:          Color32::WHITE,
                ..Visuals::light()
            };
            for (_, font_id) in &mut style.text_styles {
                font_id.size = 16.0;
            }
        });
        self.0.update(ctx, frame);
    }
}