Environment Information

• Package version(s): "office-ui-fabric-react": "7.168.2",
• Browser and OS versions: Edge / Chrome

Please provide a reproduction of the bug in a codepen: https://codepen.io/spiedra/pen/KKXRaEK?editors=1111

Actual behavior:

DetailsList is, sometimes, not rendering the last items on a long list. This error is transient and seems to be connected with how you scroll and the virtualization associated with it. We need to use virtualization, thus turning it off wouldn't work for us. For example, sometimes the last folders or files do not appear, but data-wise they should be there, and if you re-scroll or resize the screen the elements appear.

Also, sometimes when the last items are not rendering, the whole list blinks. Usually, scrolling again or re-sizing the screen or component manually fixes the issue. Please let me know what you think.

Expected behavior:

All the elements should appear and DetailsList should not ignore the last elements. Also, the link should never blink randomly.

Priorities and help requested:

Are you willing to submit a PR to fix? Yes

Requested priority: Blocking

Products/sites affected: Azure Machine Learning Notebooks