exception with lp-shell and ipython

The following Traceback occurs immediately after using

lp.bugs[

So I guess the [ is triggering it somehow.

 $ lp-shell -a
Python 3.11.5 (main, Aug 29 2023, 15:31:31) [GCC 13.2.0]
Type 'copyright', 'credits' or 'license' for more information
IPython 8.14.0 -- An enhanced Interactive Python. Type '?' for help.

Connected anonymously to LP service "production" with API version "devel":
Note: LP can be accessed through the "lp" object.

Unhandled exception in event loop:
  File "/usr/lib/python3.11/asyncio/events.py", line 80, in _run
    self._context.run(self._callback, *self._args)
  File "/usr/lib/python3/dist-packages/prompt_toolkit/input/vt100.py", line 162, in callback_wrapper
    callback()
  File "/usr/lib/python3/dist-packages/prompt_toolkit/application/application.py", line 712, in read_from_input_in_context
    context.copy().run(read_from_input)
  File "/usr/lib/python3/dist-packages/prompt_toolkit/application/application.py", line 692, in read_from_input
    self.key_processor.process_keys()
  File "/usr/lib/python3/dist-packages/prompt_toolkit/key_binding/key_processor.py", line 272, in process_keys
    self._process_coroutine.send(key_press)
  File "/usr/lib/python3/dist-packages/prompt_toolkit/key_binding/key_processor.py", line 170, in _process
    matches = self._get_matches(buffer)
              ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/key_binding/key_processor.py", line 128, in _get_matches
    return [b for b in self._bindings.get_bindings_for_keys(keys) if b.filter()]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/key_binding/key_processor.py", line 128, in <listcomp>
    return [b for b in self._bindings.get_bindings_for_keys(keys) if b.filter()]
                                                                     ^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/filters/base.py", line 134, in __call__
    return all(f() for f in self.filters)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/filters/base.py", line 134, in <genexpr>
    return all(f() for f in self.filters)
               ^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/filters/base.py", line 248, in __call__
    return self.func()
           ^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/IPython/terminal/shortcuts/filters.py", line 84, in auto_match
    return shell.auto_match
           ^^^^^^^^^^^^^^^^

Exception 'NoneType' object has no attribute 'auto_match'