This issue here is taint. There's a lot the Blizz code does with the action buttons that addons cannot because of secure execution. When we start trying to code the stuff that Blizz is doing ourselves to work around the missing macro, then we start throwing taint.
I've asked Blizz for a macro and I think it's in the latest PTR drop. I'm testing on the PTR today, so I'll report back what I find.
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