Default values for exported clusters

[hkit.yong]

Hello there, I would like to know if it is possible to set default values for clusters that will be exported into a .ghcluster file. I tried putting the values as persistent data like so:

However, if I export the cluster and try to bring it back into the document, the values are missing:

[Japhy]

You can use a pt container for example to set the point, then internalize it (right click dialog)