ST plugin to try to reproduce r-stein quick panel bug

TestQuickPanel.py

# { "keys": ["ctrl+whatever"], "command": "example" },
# { "keys": ["ctrl+whatever"], "command": "example_two" }

import sublime, sublime_plugin

# *********************
# WindowCommand Version
# *********************

class ExampleCommand(sublime_plugin.WindowCommand):

    def run(self):

        self.items = ["a", "b", "c"]
        self.window.show_quick_panel(self.items,
                                     self.on_done,
                                     sublime.KEEP_OPEN_ON_FOCUS_LOST)

    def on_done(self, index):

        if index == -1:
            msg = "You cancelled the quick panel"
        else:
            msg = "You selected: %s" % self.items[index]

        sublime.status_message(msg)


class ExampleTwoCommand(sublime_plugin.WindowCommand):

    def run(self):

        self.items = ["d", "e", "f"]
        self.window.show_quick_panel(self.items,
                                     self.on_done,
                                     sublime.KEEP_OPEN_ON_FOCUS_LOST)

    def on_done(self, index):

        if index == -1:
            msg = "You cancelled the quick panel"
        else:
            msg = "You selected: %s" % self.items[index]

        sublime.status_message(msg)


# **************************
# ApplicationCommand Version
# **************************

# class ExampleCommand(sublime_plugin.ApplicationCommand):

#     def run(self):

#         self.items = ["a", "b", "c"]
#         window = sublime.active_window()
#         window.show_quick_panel(self.items,
#                                 self.on_done,
#                                 sublime.KEEP_OPEN_ON_FOCUS_LOST)

#     def on_done(self, index):

#         if index == -1:
#             msg = "You cancelled the quick panel"
#         else:
#             msg = "You selected: %s" % self.items[index]

#         sublime.status_message(msg)


# class ExampleTwoCommand(sublime_plugin.ApplicationCommand):

#     def run(self):

#         self.items = ["d", "e", "f"]
#         window = sublime.active_window()
#         window.show_quick_panel(self.items,
#                                 self.on_done,
#                                 sublime.KEEP_OPEN_ON_FOCUS_LOST)

#     def on_done(self, index):

#         if index == -1:
#             msg = "You cancelled the quick panel"
#         else:
#             msg = "You selected: %s" % self.items[index]

#         sublime.status_message(msg)

An error example would be opened twice in the same window:

import random

import sublime
import sublime_plugin


class ExampleQuickpanelCommand(sublime_plugin.WindowCommand):
    def selected(self, index):
        if index == -1:
            return
        item = self.items[index]
        sublime.message_dialog("You selected {0}.".format(item))

    def run(self):
        self.items = [
            str(int(random.random() * 20)) for x in range(5)
        ]
        self.window.show_quick_panel(
            self.items,
            self.selected,
            flags=sublime.KEEP_OPEN_ON_FOCUS_LOST
        )

The behavior: