Does not show autocomplete for CHANGED tag

[devadarta]

When typing any tag (example: todo) the autocomplete is displayed and when choosing the plugin option, it is filled with the comment keys and the TAG typed in the correct format (ex: <-- TODO: -->). When this is done with the CHANGED tag, it does not show autocompletion. I tested with all tags and the only one that doesn't show autocomplete is with CHANGED

with autocompletion

without autocompletion