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[iOS][Metal] Crash when loading game on older devices

Mobile Graphics


Reproduction steps:
1. Download the Xcode Project from the attached link
2. Build and Deploy the app on a device
3. In the App press the Cogwheel at the top left:
"Create New Account (Skip Tutorial)" should be selected
"Office Alpha + Early Retention Test (zz)" should be selected
4. Press Play
5. After the game loads kill the App
6. Run the App again
7. Press the Cogwheel at the top left
Ensure the settings are "Office Alpha + Early Retention Test (zz)" and "Last Used Account"
8. Press Play
9. Wait for the Game to load

Reproducible with: 2019.4.3f1
Could not test with: 2018.4.34f1, 2019.4.26f1, 2020.3.8f1, 2021.1.6f1, 2021.2.0a16 (No access to the Unity project for testing)

Reproduced on:
iPhone 7 (iOS 12.3.1) - crashes after step 9. With Metal API Validation enabled crashes after step 4
iPhone 6 (iOS 12.4.8) - crashes after step 4

Could not reproduce on:
iPhone 12 Mini (iOS 14.1)

  1. Resolution Note (2021.2.X):

    It seems this is actually just an out of memory issue. The customer made some changes to memory use and the problem no longer occurs.

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