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[UI] Undo or Applying UI Prefab resets children objects position



1. Open repro scene
2. On hierarchy, select "Icon" object
3. Change transform value of the "Icon" object, e.g. Pos X = -100
4. Select "PlayerBattleUI" parent object and click Apply
3. Change transform value of the "Icon" object a several times, then Ctrl+Z to undo

Actual Result: The icon goes back to X = 0 position
Expected Result: The icon stays at X = -100 position Or undo to previous one step's position

Notes: If disable either or both of the two Image objects, the bug will not occur. But these 2 images have nothing to affect the position of the Icon object
This bug cause data lost as it resets almost all children objects in a large UI prefab.

Reproducible In: 2017.3.0b9 , 2017.3.0b7, 2017.3.0b5
Not reproducible in : 2017.3.0b4, 2017.3.0b3 , 2017.3.0b2 , 2017.2.0p1

Comments (20)

  1. A1cfc8568de108b1f03ffa388998201d?d=mm


    Oct 26, 2018 12:19

    I've got this happening on 2017.4.11f1
    Rather annoying and still occuring bug.

  2. Af3b6fac81e646f876ad6cb5bee1e1c9?d=mm


    Aug 07, 2018 07:31

    For those who for some reason (for example bugs in newer versions...) cannot upgrade, there is a workaround that worked in my case: after clicking apply and the UI getting messed up, hit undo (ctrl+z), and then apply again. The second time it doesn't get messed up.

  3. 5479ee0215b31716e6231cb87d3a4ef5?d=mm


    Jul 20, 2018 15:44

    The problem occurred when I have a "ratio" component on it.
    I just had to remove the "ratio" component and everything works but I have to found an other way to have the right ratio...

  4. 6f59fb1e5eda5cee4d4579f10b234939?d=mm


    Mar 26, 2018 17:55

    Problem is still here, and is costing me a lot of time continuously fixing it. Version 2017.3.1f1

  5. 6f59fb1e5eda5cee4d4579f10b234939?d=mm


    Mar 15, 2018 18:51

    This issue is not resolved. The slider>Fill Area > Fill moves away from the rest of the slider every time I update this prefab.

  6. 471449662f4b4a1349075cc68084986b?d=mm


    Feb 08, 2018 12:48

    Problem is still here! 2017.3

  7. 471449662f4b4a1349075cc68084986b?d=mm


    Feb 08, 2018 12:48

    Problem is still here! 2017.3

  8. 1ce45212e058a0a2b54e60222d8e858c?d=mm


    Feb 08, 2018 10:23

    Unity 2018.1.0b6 has come, and the bug is finally fixed!

  9. Dd0b98d3bb7958633047ee63644e2ad5?d=mm


    Feb 03, 2018 10:17

    OMG I am so screwed right now. This issue exists for me too after using 2017.3.0p3 for a week now. I can't go back a version either. Already been doing work.
    Idk why this just now started happening to me.
    It messed all my UI up so i have to keep fixing it each time which takes hours. Now i found this tracker so I won't even try fixing it now. It happen 4 times in a row with in the same day. omg this bug is sooooooooo bad.

  10. E0fd74c042ece4dd263089ddc72ba813?d=mm


    Jan 23, 2018 13:05

    This is still an issue, please reopen and fix asap.

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