Server stops immediately when runPlay is run from another tasks

Gradle 6.6.1. Version 0.10

Not sure what's going on here. The application runs fine from the distribution tar and if runPlay is called directly. I can see that the server starts and that port 8080 is bound but then `PlayWorkerServer::stop()` is called.

```
// TOP project
def jvmArgs = /* ... */
def createSampleAppTarget = { name, target ->
tasks.create(name: name, type: GradleBuild, dependsOn: shadowJar) {
description = "Run $target with instrumentation"
group = 'application'

startParameter = startParameter.newInstance()
startParameter.projectProperties = [
jvmArgs : "-javaagent:$shadowJar.archivePath $jvmArgs",
debugJvm : project.hasProperty('debugJvm') ? project.debugJvm : 'false',
]
tasks = [target]
}
}

createSampleAppTarget 'runInstrumentedPlayApp', ':samplePlayApp:runPlay'
```

```
// SUBPROJECT
runPlay {
httpPort = 8080

// TODO: possible to change executable? doesn't look like so
def jvmArgs = []
if (project.hasProperty('jvmArgs')) {
jvmArgs += (project.jvmArgs.split(/\s+/) as List)
}

if (project.hasProperty('debugJvm') && project.debugJvm == 'true') {
jvmArgs += ['-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=0.0.0.0:5005']
}
forkOptions.jvmArgs = jvmArgs
}
```

I can't reproduce this is the task that calls the `runPlay` task is in the same project.