'.pauseWhen' does not respect pause signal if there is was no data available

The code below should just produce timeout, but it also prints 1 despite the fact that value was produced after pause:

Stream.eval(SignallingRef[IO].of(false)).flatMap { pause =>
   Stream.sleep[IO](1.second).map(_ => 1).pauseWhen(pause).concurrently {
      Stream.sleep[IO](500.millis).evalMap(_ => pause.set(true))
   }.foreach(IO.println)
}.compile.drain.timeout(2.seconds)

FS2: 3.2.7 & 3.2.8
Scatie link: https://scastie.scala-lang.org/ZxOocFhHTK6RjuvlQ57ulw

I think, it could be fixed with either a double-checking pause state in chunks.flatMap(...) or a custom pull stage that races between next chunk pull and pause signal.

Start by reproducing the Scastie example and reading the implementation of pauseWhen, especially the chunks.flatMap(...) path mentioned in the issue. Verify that a pause signal arriving before data emission prevents that data from being printed and that the example still completes by timeout.