Drag and drop does not work correctly when data is changed while dragging

What is the expected behavior?

When change data while dragging, for example when have lazy load of items. D&d should update siblings and draggables

What is the current behavior?

current just ignore, cuz copy data before drag https://github.com/angular/material2/blob/master/src/cdk/drag-drop/directives/drop-list.ts#L322 https://github.com/angular/material2/blob/master/src/cdk/drag-drop/drop-list-ref.ts#L179

[JarekToro]

This is the solution I have found. It has Pros and Cons but i believe it can be improved further.

Listen To Move Event From cdkDrag

          (cdkDragMoved)="moved($event)"

Call $event.source.dropContainer.start();

 moved($event: CdkDragMove<any>) {
      $event.source.dropContainer.start();
  }

How this works. When you call

 $event.source.dropContainer.start();

It runs this code

    this._siblings.forEach(sibling => sibling._startReceiving(this));

That tells the dynamically added DropList to start listening for cdkDrag Items.

Pros:

• It Works

Cons:

• I don’t like it that the $event.source.dropContainer.start(); gets called a lot during the drag
• A few times the cdkDrag component losses reference to its hostElement

[rebendajirijr]

Unfortunately, the @JarekToro workaround does not work for me. Has anybody implemented some other way?