Why camunda runs 2 service task, when job executor is disabled

Camunda 7 Topics
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1

I want to test camunda delegate, when job executor is disabled, but after first service task auto run next one, when second has async continuations after.
image

val instance = runtimeService
       .createProcessInstanceByKey("process")
       .startBeforeActivity("first")
       .execute()

val job = managementService.createJobQuery()
      .processInstanceId(instance.id)
      .activityId("first")
      .singleResult()

managementService.executeJob(job.id)

How manually run second delagete?