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

[pallyloco]

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