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Fixed in Unity 2018.2



Found in


Issue ID




[iOS] Rigidbody interpolation causes objects to jitter




Priority: 2Necessary for shipping a final release


Severity: 2Core functionality majorly impacted

Steps to reproduce:
1. Download the user's attached project
2. Build to iOS
3. Observe the cube travelling in the screen

Expected: cube travels from left to right smoothly
Actual: cube jumps multiple times

Did not reproduce on: 2017.1.2p3, 2017.2.0a3
Reproduced on: 2017.2.0a4, 2017.2.0p3, 2017.3.0b11 (OpelGLES2 & Metal)

Regression introduced in: 2017.2.0a4

Reproduced with: iPhone 6S, iOS 11.0 (15A372)

Also reproduced on android:
Htc HTC 10*, OS:7.0, CPU:arm64-v8a, GPU:Adreno (TM) 530, Build:htc/pmeuhl_00401/htc_pmeuhl:7.0/NRD90M/857212.41:user/release-keys

Samsung SM G930F*, OS:7.0, CPU:arm64-v8a, GPU:Mali-T880, Build:samsung/heroltexx/herolte:7.0/NRD90M/G930FXXS1DQHF:user/release-keys

Xiaomi MI NOTE Pro*, OS:7.0, CPU:arm64-v8a, GPU:Adreno (TM) 430, Build:Xiaomi/leo/leo:7.0/NRD90M/7.11.2:user/release-keys (edited)

Comments (36)

  1. 0b72a22ae568e8c2917b00867eeba56d?d=mm


    May 22, 2018 14:41

    Any ETA? This is still not fixed in Unity 2018.1.1

  2. C2883b3d9fb6d00917592980a1baeb49?d=mm


    May 11, 2018 23:19

    I was wrong about it not being fixed in 2018.2.0b3

  3. 6fe58d5b324de5cd6a8b9e00734fe4af?d=mm


    May 08, 2018 05:41

    Still experiencing this bug in 2017.4.2f2 LTS

  4. C2883b3d9fb6d00917592980a1baeb49?d=mm


    May 05, 2018 17:37

    I also tested 2018.2.0b3 and the problem still remains in a UWP build running in Hololens.

  5. C2883b3d9fb6d00917592980a1baeb49?d=mm


    May 05, 2018 17:12

    This problem still remains in a UWP build running in Hololens. Tested in 2018.2.0b2

    Please fix

  6. D0bb5965a8517e247887c97b9114ae33?d=mm


    May 01, 2018 13:43

    I haven't tried 2017.4.2f2. Only tested 2018.2 Beta and it is fixed.

  7. E738425e63fe65b434955561949161a0?d=mm


    Apr 30, 2018 11:46

    Fixed in 2018.2 Beta or 2017.4.2f2 ?

  8. D0bb5965a8517e247887c97b9114ae33?d=mm


    Apr 29, 2018 17:30

    I confirm that fix. Not getting any jittery movement of rigid bodies on IOS anymore. Thanks.

  9. Cfbe34c57475c74177cb04975e950ccf?d=mm


    Apr 11, 2018 23:13

    Another forum thread, as I've just run into this issue too:

    I created a little test project that really shows the judder by intentionally causing the framerate to fluctuate (turning expensive particle effects on/off), as that's when the problem can go from occasional small judders to something more dramatic.

    Doesn't happen in the editor (only seen on iOS/Android so far), most noticable when the framerate is varying, doesn't affect 2D physics.

  10. 5910b75ebcabadc11908c4cd34d1421f?d=mm


    Apr 11, 2018 07:12

    FYI ; I'm also able to reproduce this issue in LTS 2017.4.1

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