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[PopupWindow] Input actions propagate on the calling window underneath and all other Windows



How to reproduce:
1. Open "Popup" project
2. Open "Window > Test > Test Window With Popup"
3. Open "Window > Test > Test Window Other"
4. Select the "Test" button on "Test Window"
5. While the popup is open, check/uncheck any of the checkboxes on "Test Window Other"
6. Select the Main Camera in Project Hierarchy
7. Select the "Test" button on "Test Window"
8. While the popup is open, check/uncheck the Camera Component in the Inspector

Expected Result: The checkbox is not changing its state
Actual Result: The checkbox is changing its state (see PopupBugGif.gif)

Reproduced with: 2020.1.0a24

Could not reproduce with: 2017.4.37f1, 2018.4.18f1, 2019.3.2f1

  1. Response avatar

    Resolution Note:

    This is by design. Mouse pass-through was a request from the UX team to reduce clicking and was fixed at the same time as other pop-up window issues were fixed. This also aligned behaviors on the 3 supported OSes.

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