How to reproduce:
1. Open the attached project (AudioMixerTest.zip)
2. In the Project window, double-click the NewAudioMixer Asset
3. In the Audio Mixer window, select + next to Groups to add a New Group
4. Rename the New Group to "Test"
5. Observe the child Assets of the NewAudioMixer in the Project window
Expected result: the child group is named "Test" in the Project window
Actual result: the child group is still named "New Group" in the Project window
Reproducible with: 2019.4.38f1, 2020.3.34f1, 2021.3.2f1, 2022.1.0f1, 2022.2.0a12
Notes:
1. Creating another New Group refreshes the name of the previous group
2. Restarting the Editor refreshes the name