CDK Drag and Drop: Auto Scroll Disabled not working from v8 on Firefox

[onyx75]

From the official sorting example, I made the list scroll by adding max-height: 180px and overflow: auto, and added the cdkDropListAutoScrollDisabled input attribute on the drop list.

Reproduction

StackBlitz to reproduce the issue:
https://stackblitz.com/edit/angular-1e8ljd?file=src/app/cdk-drag-drop-sorting-example.html

Steps to reproduce:
Drag an item to the edges

Expected Behavior

No auto scroll when close to the edges

Actual Behavior

Auto scroll is not disabled

Environment

• Angular: from v8
• CDK/Material: from v8 (v7 working fine)
• Browser(s): seems to be just with Firefox (tested on Firefox 79.0 64-bit)
• Operating System (e.g. Windows, macOS, Ubuntu): tested on macOS only

[crisbeto]

This is really odd, it seems like it's something the browser is doing natively, because the custom scrolling logic from the CDK is being disabled correctly.