In the Profiler window, when Editor Record Mode is set then on maximizing Profiler window, ArgumentNullException spams the console.
Refer attached video and attached stack trace.

Steps to repro:
1. Create a new Project.
2. Scene Window > Add Tab > Profiler
3. Profiler > Record Mode-Editor > Record
4. Maximize Editor

Actual result:
ArgumentNullException is thrown on maximizing Profiler window when Editor Record Mode is set.

Expected result:
The editor should maximize gracefully when Editor Record Mode is set.

Reproducible in:
2021.2.0a6, 2021.2.0a1, 2021.1.0b8, 2021.1.0a7

Working Fine in:
2021.1.0a6, 2020.2.6f1, 2020.1.17f1, 2019.4.21f1.

Environment:
Windows 10 and macOS 10.15