Hello just adding to this ticket that the fixed failed on version 6000.1.17f1

If the device is rotated or as the previous user stated the game loses focus the engine will lock up on iOS devices and throw the error;

error IOGPUMetalError: <private>
error Execution of the command buffer was aborted due to an error during execution. Caused GPU Timeout Error (00000002:kIOGPUCommandBufferCallbackErrorTimeout)
error IOGPUMetalError: <private>
error Execution of the command buffer was aborted due to an error during execution. Caused GPU Timeout Error (00000002:kIOGPUCommandBufferCallbackErrorTimeout)
error IOGPUMetalError: <private>
error Execution of the command buffer was aborted due to an error during execution. Caused GPU Timeout Error (00000002:kIOGPUCommandBufferCallbackErrorTimeout)
fault void IOGPUScheduler::signalHardwareError(eRestartRequest, int32_t): GPURestartSignaled stampIdx=128 type=2 prevType=0 numStamps=128
fault void IOGPUScheduler::signalHardwareError(eRestartRequest, int32_t): GPURestartEnqueued stampIdx=128 type=2
fault void IOGPUScheduler::hardware_error_interrupt(IOInterruptEventSource *, int): setting global restart type to 2
fault void IOGPUScheduler::hardware_error_interrupt(IOInterruptEventSource *, int): GPURestartDequeued stampIdx=128 type=2
fault void IOGPUScheduler::hardware_error_interrupt(IOInterruptEventSource *, int): GPURestartBegin stampIdx=128 type=2
fault void IOGPUScheduler::hardware_error_interrupt(IOInterruptEventSource *, int): global restart. type=2
fault void IOGPUCommandQueue::retireCommandBuffer(IOGPUEventFence *): Deny submissions/ignore app[CrossyRoad] with 2 GPURestarts in 229 submissions.
fault
kernel void IOGPUScheduler::hardware_error_interrupt(IOInterruptEventSource *, int): GPURestartEnd stampIdx=128 type=2

In the device console for the connected device via XCode.

To reproduce the issue the fastest ensure a build of the game is created with the ability to rotate the game from horiziontal and vertical layouts.

Once installed rotate the device from either directions, 1 in 20 rotations will lock up the game and being throwing the above stated error in console.

And listing it as what we are observing here it is in the bug format.

Steps to reproduce:
1. Build a project with rotation allowed for horizontal and vertical
2. Rotate the device between horizontal and vertical 20 times
3. Observe the screen hard lock and freeze

Expected result: The application doesn’t freeze
Actual result: The application freezes after rotation or focus change or loss

Reproducible with: 6000.1.11f1, 6000.1.17f1
Not reproducible with: 6000.1.10f1

Reproducible with these devices:
iPhone Xs Max; 18.5
iPad 7th Gen iOS; 17.4.1
iPad 11th Gen A16; 18.3

We were seeing this exact issue with our URP renderer based game on an iPhone 11 + iPad (3rd gen). The GPU throws an error and then never tries to render again, resulting in a flickering screen until the app is terminated.

Our solution was to change "MSAA x4" to "MSAA Disabled" in our URP asset and it fixed our repro cases.

It is similar to this, I believe https://discussions.unity.com/t/6000-0-57f1-6000-0-56f1-builds-hangs-on-start-for-iphone-11/1682210 I haven't seen any logs, but the behaviour of the freezing is very similar.

- unity 6000.1.16
- Execution of the command buffer was aborted due to an error during execution. Ignored (for causing prior/excessive GPU errors) (00000004:kIOGPUCommandBufferCallbackErrorSubmissionsIgnored)

- Firebase
- Facebook SDK
- Adjust
- GameAnalytics
- GoogleMobileAds
- VoxelBusters EssentialKit for CloudSave
- Applovin Max for ads

Sometimes my game freeze after OnApplicationFocus continuously log this error