Constraints within Autolayout, it works but why?

Your parent layer (component set) does not have auto layout applied.

I’ve updated the point I’m confusing, the parent one is actually the bar, but within this parent autolayout u can edit the text frame constraint, which is also autolayouted.

Please show the full screenshot, including the layers and properties panels. The reason for displaying constraints is that, as I wrote above, the parent layer does not have auto layout applied or an absolute position is applied to this object.

Oh thanks so much for this, I thought running absolute position would cause this element itself lost interaction with its parent layer!