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Fixed in 3.1.0-preview.7

Votes

4

Found in [Package]

2.0.2

Issue ID

1215035

Regression

No

[Mobile] Memory Leak when using AR Foundation and switching scenes

Package: ARFoundation

-

How to reproduce:
1. Open the attached project
2. Set iOS as build target
3. In Player settings, set camera usage description
4. Build the project for iOS
5. Build & Run to device via Xcode
6. Press "Game"
7. Press "MainMenu"
8. Repeat steps 6-7

Actual result: Unity leaks memory.
Expected result: Unity doesn't leak memory.

Reproducible with: 2019.2.20f1 (2.0.2), 2019.3.1f1 (3.1.0), 2020.1.0a23 (3.1.0).

Devices reproducible with:
- iPhone 8 Plus (iOS 12.0)
- iPhone X (iOS 11.3.1)
- iPhone 6S (iOS 13.3.1)
- VLNQA00230, Oneplus OnePlus6T (ONEPLUS A6013), Android 9, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
- VLNQA00277, Asus ROG Phone (ASUS_Z01QD), Android 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
- VLNQA00315, Samsung Galaxy Note10 (SM-N970U), Android 9, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640

Notes:
- The leak is 10 times bigger on iOS 13 devices.
- Unity's memory profiler is not detecting the leak.
- In 2019.2.20f1 (AR F 2.0.2) the leak is a lot smaller but the leak is still visible.
- Can't test 2018.4 as the project breaks.

  1. Resolution Note (fix version 3.1.0-preview.7):

    Fixed in ARFoundation and ARKit XR 3.1.0-preview.7

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Comments (2)

  1. adam_unity553

    Oct 07, 2025 11:53

    It is still reproducible on iOS using Unity 2022.3.62f2 and AR Foundation 5.2

  2. GHSmediaSrl

    Feb 24, 2020 14:51

    I'm facing the same issue (Unity 2019.2.18f1, 2019.3.1f1) ARFoundation 3.0.1, 3.1.0 preview 4
    + iPhone 7 and iOS 13.3.1

    Please urgent solution needed

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