bug(Drag & Drop): cdkDropListSorted emitted multiple times with single item

[sanderschnydrig]

Reproduction

https://stackblitz.com/edit/angular-eijk13?file=src%2Fapp%2Fcdk-drag-drop-sort-predicate-example.ts

Steps to reproduce:

1. Drag item in list
2. Move item around on top of the list

Expected Behavior

I expected the dropListSorted Event to be emitted 0 times while still inside the same container

Actual Behavior

The event is being emitted many times while dragging over the droplist

Environment

• Angular: 11-12
• CDK/Material: 12.2.1 / 9.2.0
• Browser(s): Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): Windows 10

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