"open smile" should imply both "smiling" and "open mouth"

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Something's wrong with this one: it implies "smile" instead of "smiling" and creates a separate "smile" tag which cannot be removed afterward (on >>2627219, >>2627817, >>2629336 and >>2629604) and also prevents the "smiling" tag from being subsequently added if it wasn't there already (tested it with >>2629336).

At least that's how I see it on my end. Does anyone else notice that issue, and if so, could someone fix it?
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