bokeh: AutocompleteInput does not complete word when option is clicked

I am using MacOS, Bokeh 0.12.7rc3, python 2.7.13, and Google Chrome to view a static html file generated by Bokeh. Clicking on a word in the autocomplete dropdown only sometimes (~25%) completes the word in the input box. I have not been able to see any pattern as to when it works and when it doesn’t. There is no additional information to share from the javascript console.

from bokeh.plotting import show, output_file
from bokeh.models.widgets import AutocompleteInput

output_file('autocomplete_input.html')

input_widget = AutocompleteInput(completions=['pok', 'wer', 'foo', 'bar', 'baz'], title='test')
show(input_widget)