Running PySimpleGuiQt in a thread (segfault on exit)

Question

This example creates a system icon in tray area and exit after 2 seconds. The main function is run in a separate thread.

import threading
import PySimpleGUIQt as sg


def tray_icon():
    cnt = 0
    menu_def = ["BLANK", ["Exit"]]
    tray = sg.SystemTray(menu=menu_def)
    while True:
        tray.read(100)
        cnt += 1
        print(cnt)
        if cnt > 20:
            print('Timeout reached, exiting..')
            return

t1 = threading.Thread(target=tray_icon)
t1.start()
t1.join()

print('done')

While the code does the job there seems to be an issue on script termination. This is what it shows in the terminal:

..
..
20
21
Timeout reached, exiting..
done
Segmentation fault (core dumped)

Segmentation fault appears approximately after a minute.

This seems to be specific to Qt port as replacing PySimpleGUI results in expected behaviour (script exits immediately without any error).