How to reproduce:
1. Create a new project
2. Open the Build Settings (File->Build Settings...)
3. In the Build Settings window enable "Development Build" and "Autoconnect Profiler" options
4. Build And Run the project
5. In the Profiler window switch to Editor and change Profiling Target to Editor
6. Close the Build
7. In the Profiler window switch the Profiling Target to Player

Expected results: No errors are thrown in the Console
Actual results: The "Failed to connect to player IP" error is thrown in the Console

Reproducible with: 2018.4.30f1, 2019.4.16f1, 2020.1.17f1, 2020.2.0f1, 2021.1.0a9

Notes:
- Closing the Build without switching the Profiling Target does not produce the error