with invocation set, before/after hook seems to not run correctly around `each` invocation

InvocationExample.kt

package kotlintest.playground

import io.kotlintest.KTestJUnitRunner
import io.kotlintest.specs.StringSpec
import org.junit.runner.RunWith

/**
 * Created by hoang on 7/13/16.
 */
@RunWith(KTestJUnitRunner::class)
class InvocationExample : StringSpec() {

    override val oneInstancePerTest = true

    override fun beforeAll() {
        println("====beforeAll run ${Thread.currentThread().name}")
    }

    override fun afterAll() {
        println("====afterAll run ${Thread.currentThread().name}")
    }

    override fun beforeEach() {
        println("====beforeEach run ${Thread.currentThread().name}")
    }

    override fun afterEach() {
        println("====afterEach run ${Thread.currentThread().name}")
    }

    init {
        println("==init run ${Thread.currentThread().name}")

        "a test that run multiple times" {
            println("======test run ${Thread.currentThread().name}")
        }.config(invocations = 3)
    }
}