RxJava2Debug changes behavior of replay().refCount()

[Rajin9601]

RxJava version : 2.2.8 & 2.2.1 (tested in both versions)
RxJava2Debug version : 1.4.0

Code (in Kotlin, in Android)

val tmp = Observable.just(Unit)
    .flatMap {
        Observable.just(1, 2).delay(1000, TimeUnit.MILLISECONDS)
    }.doOnNext { Log.i("TEST", "onNext: " + it.toString())}
    .replay(1).refCount()

tmp.subscribeBy { // subscription 1
    Log.i("TEST", "sub1 : $it")
}

Completable.complete()
    .delay(5000, TimeUnit.MILLISECONDS)
    .subscribeBy {
        tmp.subscribeBy { // subscription 2
            Log.i("TEST", "sub2 : $it")
        }
        tmp.subscribeBy { // subscription 3
            Log.i("TEST", "sub3 : $it")
        }
    }

Log

2019-04-30 16:52:38.364 31138-31449/com.app.sample I/TEST: onNext: 1
2019-04-30 16:52:38.364 31138-31449/com.app.sample I/TEST: sub1 : 1
2019-04-30 16:52:38.364 31138-31449/com.app.sample I/TEST: onNext: 2
2019-04-30 16:52:38.364 31138-31449/com.app.sample I/TEST: sub1 : 2

2019-04-30 16:52:42.367 31138-31450/com.app.sample I/TEST: sub2 : 2

2019-04-30 16:52:43.376 31138-31510/com.app.sample I/TEST: onNext: 1
2019-04-30 16:52:43.377 31138-31510/com.app.sample I/TEST: sub3 : 1
2019-04-30 16:52:43.377 31138-31510/com.app.sample I/TEST: onNext: 2
2019-04-30 16:52:43.377 31138-31510/com.app.sample I/TEST: sub3 : 2

Explanation

At the time of subscription 2, I expected connectable observable from replay(1) to start over and emit 1 and 2, just like subscription 3. However, subscription 2 only emits 2.

When I turn off RxJava2Debug, this works as expected like (ReactiveX/RxJava#6471 (comment)).