Proxy Table allows creating a Nested Chooser, but Edit does not open it

A Proxy Table entry allows selecting Nested Chooser and creating an embedded Chooser Table. The new Chooser's name appears in the entry, but clicking Edit does not open it, preventing us from configuring its rows and conditions.

Is embedding a Nested Chooser directly in a Proxy Table supported? If so, is this a known editor issue or is there another way to edit it?

Observed in our UE 5.8.1 source build.

Steps to Reproduce

1. Open a Proxy Table and add an entry with a Proxy Asset assigned.
2. Set its value type to Nested Chooser.
3. Choose New Nested Chooser, enter a name, and confirm.
4. Click Edit beside the newly created Chooser.

Expected: The embedded Chooser opens for editing.

Actual: The Proxy Table remains displayed; the embedded Chooser does not open.