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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. 80b4f34f0e19575793c193e98133eeb2?d=mm


    Jan 19, 2018 19:49

    Has anybody found a work around for this issue? It's driving me up the wall.

  2. 80b4f34f0e19575793c193e98133eeb2?d=mm


    Jan 19, 2018 19:38

    Can anyone from Unity please confirm that they are seeing these comments? This is the most annoying bug ever. It breaks all my prefabs when I apply. This is extremely painful for complex prefabs with a lot of child elements!!

  3. 239c252c1dfb8d55c665bbb0e498ea3a?d=mm


    Jan 18, 2018 14:58

    Is there any reason to think this is a duplicate? Please provide the information or open it as active so I can actually vote for it. This is ruining my project.

  4. 9507264a171f31a33eff5cfb158be7da?d=mm


    Jan 18, 2018 12:03

    omg this is still not fixed?

  5. E745f16f194fc39ef1df55c2d36132d0?d=mm


    Jan 17, 2018 23:32

    For the love of god please reopen and fix this!

  6. 87a139f9eb4973de0bdce0c628ea4423?d=mm


    Jan 17, 2018 01:45

    Still occurring!! And i dont see this is a duplicate of Response avatarThis is a duplicate of issue Scene gets dirtied after pressing play (it may be related to layout groups??? Nor do i understand how if I have a object anchored in one place a apply changes it?!?!?!

  7. 80b4f34f0e19575793c193e98133eeb2?d=mm


    Jan 16, 2018 19:35

    I'm with @EHeimburg and @Leorfi. This should be high priority and I don't understand how this is a duplicate. It's happening to me on Unity version 2017.3.0f3

  8. 7568b684b85757de9f43c01a199c2ce9?d=mm


    Jan 05, 2018 11:59

    This is a severity 1, I-can't-use-Unity 2017.3-AT ALL bug. I now have to revert to 2017.2.

    And you've closed it as a duplicate of a severity 3 bug. That's completely asinine. This should have been fixed in the patch already, but you effectively lowered its priority and it may never get fixed, like most pri 3 bugs don't. Get your shit together.

  9. 79f6b28ccd1031e023adb1aa61658f65?d=mm


    Nov 20, 2017 15:45

    How is this a duplicate from the issue #966172 ??

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