In the Search window, On searching for any asset Search result would come up with square symbol appearing at the end of it. Refer attached video.

Steps to repro:
1. Create a new project
2. Window > Search
3. Type any required asset name in Search (ex. cube).
4. Observe the searched asset data is appearing with Square symbol.

Actual Result:
searched asset data is appearing with Square symbol.

Expected Result:
The search window should show respective assets without throwing any error.

Occurring on:
2021.2.0a5, 2021.2.0a4

Working Fine:
2021.2.0a3, 2021.1.0b7

Note:
Quick Search is a Built-In Package in the Unity 2021.1.0a1

Environment:
Occurring on Windows 10 & macOS 10.15.