[Feature request] let the property value set by labels be derived as a value in another connected element property

[startsevsa]

For example, if we have two connected elements E1 and E2 and want to derive the property P1 value of E1 in E2 property/label.
If the P1 in E1 is set by value - this works good when using reference prefixes.
If P1 in E1 is set by label expression, then in E2 label returns null at this moment.

[totalogic]

this works good when using reference prefixes.

Could you elaborate here?