Buttons on second notification not working after first notification disappears

Submitted by Far223

Assigned to Simon Steinbeiß @ochosi

Link to original bug (#15157)

Description

Steps to reproduce: generate a first notification with “notify-send a”, then run while it's still there the following Python 3 script in a terminal:

#!/bin/python

import gi
gi.require_version('Notify', '0.7')
gi.require_version('Gtk', '3.0')
from gi.repository import Notify, Gtk

def callback(*args): print("Callback called")

Notify.init("Hello World")
notification = Notify.Notification.new("Test", "Test2")
notification.add_action("my action", "Call", callback)
notification.show()

Gtk.main()

Put your mouse over this second notification and wait for the first to disappear. When clicking on the button, the callback won't be called.

Version: 0.4.3