[Question] No event generated when target=(None, None) for FileBrowse

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

When I put Text and FileBrowse at same line, file path selected will be shown on Text. To stop it, I add target = (None, None), then no event generated.
If not put Text and FileBrowse at the same line, I don't need option target and work well.
Why no event generated when target=(None, None) and enable_events=True ?

Operating System

Win 10

Python version

Python 3.7.2

PySimpleGUI Port and Version

PySimpleGUI 4.14.0

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Code or partial code causing the problem

import PySimpleGUI as sg

font1 = 'Courier 16'
font2 = 'Courier 12'

layout = [[sg.Text('Select File to check', font=font1),
           sg.FileBrowse(
                'Browse', target=(None, None),
                file_types=[("All Python Files", "*.py")],
                enable_events=True, size=(10,1), font=font1, key='-Browse-')],
          [sg.Output(size=(120, 30), font=font2, key='-Output-')]]

window = sg.Window('test', layout=layout, finalize=True)

while True:

    event, values = window.read()
    print(event, values)

    if event is None:
        break

    if event == '-Browse-':
        path = values['-Browse-']
        f = open(path, 'rt', encoding='utf-8')
        lines = f.readlines()
        for line in lines:
            print(line.strip())

window.close()

Start by reproducing the provided Python snippet and trace FileBrowse's handling of target=(None, None) together with enable_events=True. Determine whether the documented behavior or event dispatch should change, then verify the chosen behavior with a focused reproduction or test.