bpython version 0.21 on top of Python 3.7.9 /Users/bryanhu/.local/pipx/venvs/bpython/bin/python

Traceback (most recent call last):
  File "/Users/bryanhu/.local/bin/bpython", line 8, in <module>
    sys.exit(main())
  File "/Users/bryanhu/.local/pipx/venvs/bpython/lib/python3.7/site-packages/bpython/curtsies.py", line 201, in main
    exit_value = repl.mainloop(True, paste)
  File "/Users/bryanhu/.local/pipx/venvs/bpython/lib/python3.7/site-packages/bpython/curtsies.py", line 113, in mainloop
    self.process_event_and_paint(None)
  File "/Users/bryanhu/.local/pipx/venvs/bpython/lib/python3.7/site-packages/bpython/curtsies.py", line 95, in process_event_and_paint
    array, cursor_pos = self.paint()
  File "/Users/bryanhu/.local/pipx/venvs/bpython/lib/python3.7/site-packages/bpython/curtsiesfrontend/repl.py", line 1615, in paint
    self.cursor_offset,
AssertionError: (-1, 163, 5, 0, 0)