Emojis autocomplete issue with "emoji autocomplete min chars" > 0

[codinghorror (Jeff Atwood)]

@Canapin

If there is any text in front of the same line (even just a space), hen I start to write : following by letters or keywords, autocompletion won’t be displayed.

I can’t reproduce this here on meta? I have text on the same line, followed by :, and I get emoji autocomplete just fine?