Why can't I round the two rightmost vertices in this object?

[eobet]

As you can see, I've managed to round the two on top, but the two on the right refuse to respond. Why?

 

 

round-corner-no-work.afdesign

[NathanC]

Hi @eobet,

Looks like the curve is open on the right hand side where the two nodes are (turn off the fill on the curve and you'll see this). Use the 'Close Curve' function on the node tool with one of the nodes selected and then try using the Corner tool again.

round-corner-now-works.afdesign

[eobet]

Thank you, I did not notice that, and it's even hard to see once you pointed it out.

But I closed it now and it works.

Could the UX be better here, I wonder? Perhaps color the vertices red when selected while the corner tool is active or something?