Stream.fromIterable(things).asyncMap(convert) Skipping elements of the list.

[Mo5hu]

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Issue Info

Info	Value
Platform Name	flutter
Platform Version	3.0.5
Xcode Version	Xcode 13.2.1
Repro rate	all the time (100%)
Repro with our demo prj	I don't think this has been used there
Demo project link	link to the demo project that highlights the issue

Issue Description and Steps

I am trying to use a Stream.fromIterable(things).asyncMap(convert);

Future<TouchPoints?> convert(TouchPoints? thing) async {
    await Future.delayed(const Duration(milliseconds: 2));
    // changing the delay for function does affect the
    // accuracy of painter results.
    // set this to 5 milliseconds and then there will be a smooth line, which is not required here.
    // set this to 25 milliseconds, or more, and then there will be a dotted line of x = y.

    return thing;
  }

  Stream<TouchPoints?> doStuff(List<TouchPoints?> things) {
    return Stream.fromIterable(things).asyncMap(convert);
    // This asyncMap seems to be the culprit here, My Guess!...
  }

This returned stream is used to stream points, used along with a custom painter.

The issue here is that with Future.delayed(const Duration(milliseconds: 2));, stream snapshot.data doesn't returns the complete array thus we see results like:

but when used with Future.delayed(const Duration(milliseconds: 25));, or greater than 25 milliseconds, the results are as expected. See picture below:

Note*: not looking for alternatives to draw a dotted line here, i am curious to find out why does asyncMap skips the elements of the array here, or might some other issue.