Camunda 7.21 REST deliverMessage returns empty execution

Hi,
after upgrading vom Camunda 7.17 to 7.21 my integration tests picked up changed behaviour of the REST-API.

When a message is sent via the REST API that leads to the cancelation of a running process via error-handler, then the execution-attribute in the REST response is empty.
In 7.17, the execution-attribute was populated.

Is this behaviour intended or a regression?

Many thanks
Ulf

Details

REST-Call: Message->Correlate

Request:

{
  "messageName": "BewilligungGenerischCancelMessage",
  "withoutTenantId": false,
  "processInstanceId": "63e11c6b-54ac-11ef-92ef-0242ac12000a",
  "all": false,
  "resultEnabled": true,
  "variablesInResultEnabled": true
}

Response

[
  {
    "resultType": "Execution",
    "execution": null,
    "processInstance": {
      "links": [],
      "id": "63e11c6b-54ac-11ef-92ef-0242ac12000a",
      "definitionId": "e96912ee-54a1-11ef-92ef-0242ac12000a",
      "businessKey": null,
      "caseInstanceId": null,
      "ended": true,
      "suspended": false,
      "tenantId": "stbe"
    },
    "variables": { ... }
  }
]