ttk.tkinter.Notebook does not refresh notebook page on Mac unless mouse moves out of tab area

Bug report

Bug description:

Test Code:

from tkinter import *
from tkinter.ttk import Notebook

mw = Tk()
mw.title("Notebook Test")
mw.geometry(f"{800}x{800}")

main_page_frame = Frame(mw, borderwidth=1, relief='ridge')
main_page_frame.pack(side='top', expand=1, fill='both')

notebook = Notebook(main_page_frame)
notebook.pack(expand=1, fill='both')

for info in ("one", "two", "three"):
    frame = Frame(mw)
    Label(frame, text=info).pack()
    notebook.add(frame, text=info)

mw.mainloop()

Test Computer

MacOS Sequoia: Version 15.3.1

Problem

prepare

Click on the three tabs, one after another. The behaviour is what one would expect

execution

• carefully click on a new tab... but don't move the mouse once you have clicked

problem

• the notebook page does not refresh (i.e. you won't see the label within the notebook)
• if you move the mouse carefully just within the tab name area, nothing happens
• if you move the mouse outside of this area, the label will suddenly appear.

Note

Tried this on a windows machine, and the behaviour as it should be, so this problem seems to be a MAC problem (don't have a linux machine so can't try there).

According to the documentation, the MAC python 3.13 has its own version of Tcl/Tk, so maybe this is a Tcl/Tk problem, and not a python problem?

CPython versions tested on:

3.13

Operating systems tested on:

macOS

Beginne damit, das mitgelieferte Notebook-Beispiel unter macOS Sequoia mit Python 3.13 auszuführen und das Verhalten beim Klicken auf Tabs mit Windows zu vergleichen. Lies die Implementierung von tkinter Notebook und das im Bericht erwähnte Verhalten von macOS Tcl/Tk. Erledigt ist es, wenn durch die Auswahl eines Tabs dessen Seite sofort angezeigt wird, ohne die Maus aus dem Tab-Bereich zu bewegen.