Elsa 3.1.3 Http end point using dispatch workflow not waiting for child workflow completion even though 'Wait for completion' set true

Dispatch workflow not waiting for child workflow completion even though 'Wait for completion' set true.

Attached is the workflows tested for using Http end point.

[parent.json](https://github.com/elsa-workflows/elsa-core/files/15204455/parent.json)
[child.json](https://github.com/elsa-workflows/elsa-core/files/15204456/child.json)

Before child workflow completes HttpResponse is returned . As shown in screenshots below 'WriteHttpResponse' goes to suspended state as the response is already returned.



Reproduce the behavior through the HTTP endpoint using the attached parent.json and child.json workflows. Start by tracing the dispatch workflow path with “Wait for completion” enabled and observe when WriteHttpResponse runs relative to child workflow completion. Done means the supplied scenario waits for the child to complete before returning the HTTP response.

Written by the indexing model from the issue text.