How to reproduce:
1. Open the user-attached project “findBug_ECSinspectorMode”
2. Open the “SampleScene” scene
3. In the Inspector open the three-dot menu → Add Tab → Inspector to open the second Inspector
4. Change the Layout so two Inspectors are visible at once
5. In the Hierarchy under the subscene “SubScene” select the “Cube” GameObject
6. In one of the Inspectors change the data mode to “Runtime” (Circle near the lock icon in the right-upper corner)
7. Observe the Inspectors

Expected results: Only the Inspector where the data mode was changed is affected
Actual results: Both of the Inspectors are affected and the second one is rendered blank

Reproducible with: 1.0.16 (2022.3.29f1), 1.2.0, 1.2.1 (2022.3.29f1, 6000.0.2f1)
Can’t test with: 2021.3.38f1 (Package versions are not available)

Reproducible on: Windows 11 Pro
Not reproducible on: No other environment tested