In the LVGL simulator, the window cannot be resized below a certain size

How-to
1

I set the resolution to 200x200, but the actual window size is not what I set. In reality, the window appears to have a fixed minimum size, and no matter how I set it, it cannot be smaller than a certain specific value.
I created it like this

int32_t zoom_level = 100;
    bool allow_dpi_override = false;
    bool simulator_mode = false;
    lv_display_t* display = ::lv_windows_create_display(
        L"LVGL Windows Application Display 1",
        200,
        200,
        zoom_level,
        allow_dpi_override,
        simulator_mode);
    if (!display)
    {
        return -1;
    }

but the window is like this
U9B{MZR$Z5GESREQCUTDQB
what‘s wrong with my code?
Thank you in advance for your guys assistance.

2