flatMapLatest spawns next substream before the previous is disposed about bacon.js HOT 1 OPEN

var subStream = x => { 
   console.log(`Creating substream ${x}...`); 
   return B.fromBinder(sink => {
      const interval = setInterval(sink, 1000, x);
      return () => {
         console.log(`disposing substream ${x}...`);
         clearInterval(interval);
      };
   });
 };
B.sequentially(2500, ["A", "B", "C"])
.flatMapLatest(subStream)
.take(7).onValue(console.log);
/*
Creating substream A...
A
A
Creating substream B...    ↑  incorrect order
disposing substream A...   ↓
B
B
Creating substream C...    ↑  incorrect order
disposing substream B...   ↓
C
C
disposing substream C...
C
*/

var callNextTick = f => x => B.later(0, x).flatMap(f);

B.sequentially(2500, ["A", "B", "C"])
.flatMapLatest(callNextTick(subStream))
.take(7).onValue(console.log);
/*
Creating substream A...
A
A
disposing substream A...
Creating substream B...
B
B
disposing substream B...
Creating substream C...
C
C
disposing substream C...
C
*/