Insert blank lines work on quill playground, but not in my instace of quill inside pywebview

[Wehaveall]

First, congratulations for the excellent project! I have this code that works in any html editor, including quill playground, but does not work in my quill editor inside a pywebview window: It creates 3 empty lines, past a image, move the cursor up, and then insert the text (I know I could use quill's API, but want a more generic approach to all html editors. Any idea whats is going on??

` # 5. Insert image first (if present)
if image_base64:
self.copy_image_to_clipboard(image_base64)
self.paste_image()
time.sleep(0.5)

    # 6. Insert lines above the image
    newline = "\r\n"
    for _ in range(3):  # Insere 3 linhas acima da imagem
        for char in newline:
            win32gui.SendMessage(focused_hwnd, win32con.WM_CHAR, ord(char), 0)
        time.sleep(0.05)

    # 7. Move the cursor up (3 lines)
    for _ in range(3):
        win32gui.SendMessage(focused_hwnd, win32con.WM_KEYDOWN, win32con.VK_UP, 0)
        win32gui.SendMessage(focused_hwnd, win32con.WM_KEYUP, win32con.VK_UP, 0)
        time.sleep(0.05)`