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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. 6539f4c005d74696be9ae3b2c6a1267b?d=mm


    Dec 24, 2017 14:53

    I don't see how this version was released with such a huge problem. Beta testing?

  2. D0bb5965a8517e247887c97b9114ae33?d=mm


    Dec 20, 2017 07:12

    I've just upgraded to 2017.3 and still have the same problem.

  3. D0bb5965a8517e247887c97b9114ae33?d=mm


    Dec 19, 2017 13:00

    We are also having the exact same problem in 2017.2 on iPhone6+ and iPhone5.

  4. Ae6eb985b41c5c1aaf3e457c93034257?d=mm


    Dec 10, 2017 02:45

    Same issue here in 2017.2.0 and 2017.2.0p4 on iPhone6+ / iOS11.x. Really glad I found this thread as it is almost not noticeable in my project and if it weren't for the fact that I have spent a year working on the project and building to the device I would have had a very hard time proving the existence of the problem to some associates.

  5. E26aa74ff05bd2b8860994fc57ec1b7e?d=mm


    Dec 07, 2017 03:43

    We have some sort of interpolation issue with Unity that has come up in 2017.2 see below:

    Footage in 2017.1.2
    Footage in 2017.2

    It appears to be the same issue as this, with physics interpolation hiccuping and stuttering. We have rolled back our versions of Unity to 2017.1.2 and are hoping this issue is fixed in a future Unity release.

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