Event handler: "Current document properties have changed" properties display should advertise Complex identifiers

Preparation steps
Create a schema "MySchema"
Create 3 Complex properties "A", "B" and "C".
Create for the 3 Complex inner metadata identified with "content" and type Blob
Create an Event Handler and add "before document modification" trigger

Reproduction
Look in the "Current document properties have changed" property choice:
Notice the output:

content/digest
content/digest
content/digest
content/encoding
content/encoding
content/encoding
[...]

where it should ideally read:

A/content/digest
A/content/encoding
[...]
B/content/digest
B/content/encoding
[...]
C/content/digest
C/content/encoding
[...]

The request is to be able to identify which Complex you are taking the property of.