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Fixed in Unity 2018.2



Found in


Issue ID




The AspectRatioFitter with envelope parent mode doesn't control the RectTransform at the first frame after changing the scene




Priority: 2Necessary for shipping a final release


Severity: 3Secondary functionality broken

Reproduction steps:
1. Download project "" and open in Unity
2. Open Main scene
3. Enable Play mode

Expected: scene changes smoothly
Actual: scene experiences a glitch (appears at the end of the GIF)

Reproduced on: 2017.3.0f1; 2017.3.0p4; 2018.1.0b5; 2018.2.0a1
Not reproduced on: 2017.2.1p3; 2017.3.0a1; 2017.3.0b11
Regression introduced: 2017.3.0f1

Comments (2)

  1. F53bd3f72eb170db2eafccbd6407d58c?d=mm


    Sep 06, 2018 08:06

    A quick workaround for this issue on earlier Unity version is to do this in the first frame, which forces the component to update:

    foreach (var arf in gameObject.GetComponentsInChildren<AspectRatioFitter> ()) {
    var restore = arf.aspectRatio;
    arf.aspectRatio = arf.aspectRatio*1.001f;
    arf.aspectRatio = restore;

  2. Ebfd7874eba05a9f22f7fa28d26e5b5b?d=mm


    Apr 19, 2018 04:34

    This particular issue appears to be fixed in 2017.3.1p4. However, there is still another closely related one:

    When SetActive(true) is called on a previously disabled canvas during a Update() or LateUpdate() event from another script, the RectTransform is not recalculated until next frame. The symptom is the same as this one (incorrect RectTransform dimension for one frame).

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