Only one Gradient Inspector window refreshes when multi-editing objects which initially had different parameters

Reproduction steps:
1. Open the attached project ("RefProject.zip")

2. Open the SampleScene

• Ensure to have 2 inspectors open.
  3. Select all Gradient objects in the Scene
  4. Observe that the Grad parameter is shown as different across all objects
  5. Edit the Grad parameter

Expected result: The Grad parameter is changed for all Gradient objects and All Inspector windows show updated and identical information
Actual result: The Grad parameter is changed for all Gradient objects, however, only one Inspector window is updated

Reproducible with: 2018.4.36f1, 2019.4.29f1, 2020.3.14f1, 2021.1.15f1, 2021.2.0b4, 2022.1.0a3