bug(VIRTUAL-SCROLL): In append only mode, when scrolling fast, list is jumping to start

[McKlobasa]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

Screen.Recording.2022-06-15.at.08.03.33.mov

When scrolling through example for appendOnly on documentation site (https://material.angular.io/cdk/scrolling/overview), the list acts glitchy. It is constantly jumping back to the begining.

Reproduction

Steps to reproduce:

1. add appendOnly attribute
2. scroll fast

Expected Behavior

It shouldn't do that.

Actual Behavior

It is jumping back to the start of the list.

Environment

• Angular:
• CDK/Material: at least from 12 to 14
• Browser(s): Chrome v100
• Operating System (e.g. Windows, macOS, Ubuntu): macOs

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}