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Fixed in 2022.1.X

Fixed in 2020.3.X, 2021.1.X, 2021.2.X



Found in


Issue ID




Stuttering Scene view and Game view when in Play mode



How to reproduce:
1. Open the user-submitted project
2. Open the scene "2dtest" (Assets/Scenes/2dtest.unity)
3. Enter Play mode

Expected result: The Circle GameObject moves smoothly from left to right
Actual result: The Circle GameObject stutters while moving from left to right

Reproducible with: 2022.1.0a7, 2022.1.0a8
Not reproducible with: 2019.4.30f1, 2020.3.17f1, 2021.1.20f1, 2021.2.0b11, 2022.1.0a6

1. Reproduces on Mac, couldn't reproduce on Windows
2. The Play mode statistics report high framerates despite the stuttering performance

  1. Response avatar

    Resolution Note (fix version 2022.1):

    Frames were being unnecessarily dropped before presenting on Metal OSX when using CVDisplayLink; this is now fixed.
    Fixed in: 2022.1.0a12

  2. Response avatar

    Resolution Note (fix version 2021.2):

    Frames were being unnecessarily dropped before presenting on Metal OSX when using CVDisplayLink; this is now fixed.
    Fixed in: 2021.2.0b15

  3. Response avatar

    Resolution Note (fix version 2021.1):

    Fixed in: 2021.1.26f1

  4. Response avatar

    Resolution Note (fix version 2020.3):

    Fixed in: 2020.3.21f1

Comments (9)

  1. 534f4063003fc12875434de66440e0a9?d=mm


    Oct 29, 2021 14:31

    In 2021.2.0 in mac it is resolved but, the ui interface crash my computer and shut down.

  2. 1bdd39199ed44257af649bf7a027b4c9?d=mm


    Oct 17, 2021 16:34

    • 2020.3.19 LTS Stuttering
    • 2020.3.18 LTS working fine

    ... also Bad in 2020.3.20 LTS
    ... and 2021.1.?

  3. B3159ce9a89558786da050e88f85bc4a?d=mm


    Oct 13, 2021 15:56

    Experencing this on 2020.3.20, it was fine on 2020.3.18. I think??
    Any others ?

  4. 8bb9310a61e6ca3ecf2f78ccffd85e30?d=mm


    Oct 12, 2021 15:07

    What's the backport ETA for 2020.3.x LTS?

  5. 35d2da78dad7bd880b4e6c297748025d?d=mm


    Oct 08, 2021 15:46

    I'm still getting a fair bit of lag in 2021.2.b15. 60 fps reported in the game view but it feels like 30-40 fps. In comparison, b11 is buttery smooth and matches the 60 fps. Using HDRP template scene.

  6. 53bac73f6961e58d1e951eaeb226052e?d=mm


    Oct 04, 2021 23:41

    fyi - we started experiencing this issue from 2021.1.22 onward, and other on the forum are getting this from 2020.3.19 onward.

  7. 42ecd3e177aa259ba71d24c720e76199?d=mm


    Oct 04, 2021 07:09

    Yes, 2020.3 backports are planned

  8. 433a09c7cf4afc034373b0c3fbf03e67?d=mm


    Oct 04, 2021 06:51

    2021.1.23f1 also has this issue

  9. 1c6b8cdf25dbc9aba51db8e35f5a9559?d=mm


    Sep 29, 2021 20:53

    2020.LTS backport planned?

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