On changing the 'Target Selection' in the Standalone Profiler from the default 'Playmode' to 'Editor' stops data profiling, throws continuous Null Reference Exceptions and also leads to the Menu Bar flickering constantly.
Refer to the attached video.

Steps to Reproduce:
1. Create a New Project
2. Window > Analysis > Standalone Profiler
3. Enter and exit Play mode (Observe that errors are thrown but they stop after exiting Play mode)
4. Change profiler mode to Editor (Observe continuous errors that don't stop)
5. Change profiler mode back to Playmode
6. Enter Play mode again

Actual Result:
Continuous Null Reference Exceptions are spammed in the console and the profiler stops profiling for 'Playmode' and continues for 'Editor'.

Expected Result:
Profiler profiles Editor Data and Playmode data according to the 'Target' selected.

Occurring on:
2020.1.0a23

Working Fine on:
2020.1.0a22, 2020.1.0a21

Note:
Standalone Profiler was introduced in 2020.1.0a21

Environment:
Windows 10 and macOS 10.14, 10.15