OnWhen adds additional 'when' step in case of OnException in Route Configurations

[vijayrhythm]

Describe the bug

When we add On Exception Definition with OnWhen statement with YAML DSL, it adds additional when statement unexpectedly when we switch between 'Routes' tab and 'YAML' tab. This cause failure. It appears to require a fix similar to issue 1420 where it resolved the same for CatchDefinition. Please could someone help to resolve it. Thanks.

• route:
  id: route-d663
  nodePrefixId: route-52e
  from:
  id: from-d6c1
  uri: amqp
  steps:
  - choice:
  id: choice-d1e9
  when:
  - id: when-19d8
  expression:
  groovy:
  id: groovy-1c57
  expression: 1=1
  otherwise:
  id: otherwise-c779
• routeConfiguration:
  onException:
  - onException:
  id: onException-04a7
  onWhen:
  when:
  id: when-61ee
  expression:
  simple:
  id: simple-c2b6
  expression: ${exception.statusCode} == 500

Steps to reproduce the behavior

1. Create a flow adding On Exception with OnWhen step in a Route Configuration (below is an example)
   "- route:
   id: route-d663
   nodePrefixId: route-52e
   from:
   id: from-d6c1
   uri: amqp
   steps:
   - choice:
   id: choice-d1e9
   when:
   - id: when-19d8
   expression:
   groovy:
   id: groovy-1c57
   expression: 1=1
   otherwise:
   id: otherwise-c779
   "- routeConfiguration:
   onException:
   "- onException:
   id: onException-04a7
   onWhen:
   id: when-61ee
   expression:
   simple:
   id: simple-c2b6
   expression: ${exception.statusCode} == 500
2. Switch between Routes (route view) and coming back to YAML editor
3. We see an additional 'when' statement below On When
   " - routeConfiguration:
   onException:
   • onException:
     id: onException-04a7
     onWhen:
     when:
     id: when-e875
     when:
     id: when-61ee
     expression:
     simple:
     id: simple-c2b6
     expression: ${exception.statusCode} == 500

Variant

Web Application

Container Management (if applicable)

None

Operating System (if applicable)

None

Version

4.8.0

Relevant log output

No response