Type of Issue (Enhancement, Error, Bug, Question)

Bug

Environment

Operating System

Linux version ('glibc', '2.35')

PySimpleGUI Port (tkinter, Qt, Wx, Web)

tkinter

Versions

Python version (sg.sys.version)

3.10.12 (main, Nov 20 2023, 15:14:05) [GCC 11.4.0]

PySimpleGUI Version (sg.__version__)

5.0.4.15

GUI Version (tkinter (sg.tclversion_detailed), PySide2, WxPython, Remi)

8.6.12

Your Experience In Months or Years (optional)

Years Python programming experience
Years Programming experience overall
No Have used another Python GUI Framework? (tkinter, Qt, etc) (yes/no is fine)

Troubleshooting

These items may solve your problem. Please check those you've done by changing - [ ] to - [X]

• Searched main docs for your problem https://Docs.PySimpleGUI.com
• Looked for Demo Programs that are similar to your goal.
  It is recommend you use the Demo Browser! https://Demos.PySimpleGUI.com
• If not tkinter - looked for Demo Programs for specific port
• For non tkinter - Looked at readme for your specific port if not PySimpleGUI (Qt, WX, Remi)
• None of your GUI code was generated by an AI algorithm like GPT
• Run your program outside of your debugger (from a command line)
• Searched through Issues (open and closed) to see if already reported https://Issues.PySimpleGUI.com
• Have upgraded to the latest release of PySimpleGUI on PyPI (latest official version) https://Upgrading.PySimpleGUI.com
• Tried running the Maintenance Release. Use Home Window to access Maint Releases
• For licensing questions please email mailto:license@PySimpleGUI.com

Detailed Description

When multiple windows are open and overlapping, moving the mouse to the parent window sends child to the back. I have 2 windows, the first has a button to call the second window. If the second window overlaps the parent window in any way, moving the mouse into the parent window immediately gives focus to that, hiding the overlapping portion of window 2. It should require a mouse click in the parent window before giving it focus.
If I comment out the 'use custom titlebar' option it works correctly but I then have borders around the window, so things like the button bar, status bar are indented on both sides, looking pretty ordinary. I have tried defining the titlebar separately & not setting the option within the window call but the result is the same.

Code To Duplicate

import PySimpleGUI as sg

def main_window():
    winsize = (800, 600)
    toolbar_buttons = [[sg.Button('Test', key='-TEST-')]]
    layout = [[sg.Frame('', toolbar_buttons, title_color='white', size=(winsize[0], 30),
                        pad=(0,0), background_color=sg.COLOR_SYSTEM_DEFAULT)]]
    win1 = sg.Window('test', size=winsize,
                     use_custom_titlebar=True,
                     layout=layout)

    while True:
        event, values = win1.read()
        print('main event= ', event)
        if event == '-TEST-':
            second_window()
        if event in (sg.WIN_CLOSED, '-CANCEL', 'CANCELB', '-EXIT-'):
            break
    win1.close()


def second_window():
    winsize = (600, 400)
    layout = [[sg.Text('Input',pad=(5, 0))],
              [sg.Input()]
              ]
    win2 = sg.Window('test', layout=layout, size=winsize,
                     keep_on_top=True, use_custom_titlebar=True)
    while True:
        event, values = win2.read()
        if event in (sg.WIN_CLOSED, '-CANCEL', 'CANCELB', '-EXIT-'):
            break
    win2.close()


if __name__ == '__main__':
    main_window()

Screenshot, Sketch, or Drawing