Canvas Scaler causes abnormal scaling of Canvas elements in Play Mode when UI Scale Mode is set to "Constant Physical Size" and any Editor window is moved to a differently scaled monitor and is interacted with

How to reproduce:

1. Set up one monitor with a scale different than the other monitor (Display Settings > Scale)
2. Open the “unity-canvas-scaler-bug.zip“ project
3. Open the “SampleScene” (Assets > Scenes > SampleScene)
4. Enter the Play Mode
5. Open any Editor window (i.e. Preferences window) and drag it onto the other monitor
6. Move the mouse pointer within that window
7. Observe the Game view

Expected result: Canvas is not being scaled differently while the mouse pointer is being moved
Actual result: Canvas is being scaled differently while the mouse pointer is being moved

Reproducible in: 2021.3.33f1, 2022.3.15f1, 2023.2.3f1, 2023.3.0a17

Reproduced on: Windows 11 Pro
Not reproduced on: No other environment tested

Note:

• The reporter also notes that the issue does not reproduce if the window is moved to another screen with the same DPI scaling setting (not tested)
• The issue can be also reproduced with a keyboard if it is used on the window, on the other monitor, on the fields that require keyboard input