[SDPhantom]

Something I noticed is HelpTip:Show() calls HelpTipTemplateMixin:Init() on the acquired frame.

hooksecurefunc(HelpTipTemplateMixin,"Init",function(self,parent,info,relregion)
    if info.system=="MicroButtons" then
        info.targetPoint=HelpTip.Point.BottomEdgeCenter;
        self:AnchorAndRotate();
    end
end);

This hooks into the initialization of the acquired frame. HelpTipTemplateMixin:AnchorAndRotate() is called again as it's in charge of applying the setting. This is called from HelpTipTemplateMixin:OnUpdate(), but that's only registered to run in specific circumstances.