SendAndReceive does not trigger when subscriber is a method

[joemccall86]

Task List

• Steps to reproduce provided
• Stacktrace (if present) provided
• Example that reproduces the problem uploaded to Github
• Full description of the issue provided (see below)

Steps to Reproduce

1. Subscribe to an event topic with a closure subscriber
2. Publish to that topic using sendAndReceive with a reply closure
3. Observe the event is handled by the closure subscriber
4. Observe the reply closure is called
5. Subscribe to an event topic with a method subscriber
6. Publish to that topic using sendAndReceive with a reply closure

Expected Behaviour

Once the subscriber handles the event, trigger the reply closure.

Actual Behaviour

The event is handled, but the reply closure is not called

Environment Information

• Operating System: Fedora 35
• Grails Version: 5.1.2
• JDK Version: 11.0.14
• Container Version (If Applicable): N/A

Example Application

• Sample application: https://github.com/davebrown1975/GrailsSendAndReceive
• I have set this up in a unit test on my fork: joemccall86@719e59d
• PR will immediately follow this issue