Cannot set Unique Key of repeat children

Similar to:

Wappler Version : 4 b13
Operating System : mac
Server Model: node
Database Type:
Hosting Type:

Expected behavior

I should be able to select a Unique Key of a repeat children element.

Actual behavior

No bindings available.

How to reproduce

Set the expression of a repeat children element to an array:

Attempt to select the Unique Key:

This has been fixed in Wappler 4.0.4