Custom procedure not get called from Bloom scene action, how to diagnose the situation?

Neo4j Graph Platform Neo4j Bloom
1

I created a custom procedure chat.ask() in Java, it works well when triggered from browser with

MATCH (q:Message {role: 'user'}) 

CALL chat.ask(q, 'gpt-3.5-turbo') YIELD ans, r

RETURN ans, r, q

But when I define a Bloom scene action with

MATCH (q:Message {role: 'user'}) WHERE id(q) in $nodes

CALL chat.ask(q, 'gpt-3.5-turbo') YIELD ans, r

RETURN ans, r

and try to execute it with mouse menu, nothing happens.

The Java code would log to logs/neo4j.log anyway, the browser execution case verifies that, while the scene action case looks like the Java method not get called at all.

I don't think it's privilege issue, as another cypher-only scene action works as expected:

MATCH (q:Message {role: 'user'}) WHERE id(q) in $nodes

CREATE (a:Message {role: 'assistant', content: 'The answer to your question is ...'})
CREATE  (a)-[r:CONTINUES]->(q)

RETURN a, r