AR Application Hard Crashing on UE5.7.3

Development Platform & Builds Mobile
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1

Hey all,

Would seem as if when you try and start an AR Session on UE5.7.3, on IOS, using world tracking, it hard crashes.

This is when building from a macbook, not tested on windows yet.

If you change the method to ‘image’, then it prevents the crash. Odd thing though is that i can’t see any obvious changes in github to the Apple AR framework that would cause this crash.

Project is to big to be included to replicate, but it’s ultimately the HandheldAR project, this is also happening on other projects for us.

Thanks,

2

Steps to Reproduce
Build application to IOS device, application will hard crash when using ‘world’ tracking. If you boot the same project with ‘image’ instead of world, application will not crash.

3

Incase the crash log didn’t come across :

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: === Critical error: ===

[2026.02.11-14.29.46:927][ 0]LogIOS: Error:

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 5 HandheldAR 0x0000000100d910c0 FMallocBinned2::Free(void*) + 672

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 6 AppleCV3D 0x0000000232dee960 CV3DSLAMConfigEnableDataVerificationLatencyCheck + 2520

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 7 AppleCV3D 0x0000000232def6e0 CV3DSLAMConfigCreateFromCameraModel + 152

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 8 ARKitCore 0x00000001d1ffd2ec 83A39630-D19B-3BBE-87A2-789CAF10C925 + 373484

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 9 ARKitCore 0x00000001d202d4cc ARVisionDataParametersForWorldTrackingOptions + 244

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 10 ARKitCore 0x00000001d2036eac 83A39630-D19B-3BBE-87A2-789CAF10C925 + 609964

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 11 ARKitCore 0x00000001d20373f4 83A39630-D19B-3BBE-87A2-789CAF10C925 + 611316

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 12 ARKitCore 0x00000001d2000d30 83A39630-D19B-3BBE-87A2-789CAF10C925 + 388400

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 13 ARKitCore 0x00000001d2082e04 83A39630-D19B-3BBE-87A2-789CAF10C925 + 921092

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 14 ARKitCore 0x00000001d207e498 83A39630-D19B-3BBE-87A2-789CAF10C925 + 902296

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 15 libdispatch.dylib 0x00000001a3fc1248 C05E486D-81F2-367E-9CE1-E14573C4C268 + 8776

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 16 libdispatch.dylib 0x00000001a3fc2fa8 C05E486D-81F2-367E-9CE1-E14573C4C268 + 16296

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 17 libdispatch.dylib 0x00000001a3fca5cc C05E486D-81F2-367E-9CE1-E14573C4C268 + 46540

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 18 libdispatch.dylib 0x00000001a3fcb158 C05E486D-81F2-367E-9CE1-E14573C4C268 + 49496

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 19 libdispatch.dylib 0x00000001a3fd638c C05E486D-81F2-367E-9CE1-E14573C4C268 + 95116

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 20 libdispatch.dylib 0x00000001a3fd5bd8 C05E486D-81F2-367E-9CE1-E14573C4C268 + 93144

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 21 libsystem_pthread.dylib 0x0000000226e80680 _pthread_wqthread + 288

[2026.02.11-14.29.46:927][ 0]LogIOS: Error: 22 libsystem_pthread.dylib 0x0000000226e7e474 start_wqthread + 8

[2026.02.11-14.29.46:927][ 0]LogIOS: Error:

4

This issue is known and logged. I will keep this ticket open and provide you with a fix when we have one, thanks!

5

Nudging this so it doesn’t get closed. (I got an email).

thanks!

6

This was recently fixed (for 5.8). You can find the CL here: https://github.com/EpicGames/UnrealEngine/commit/23a23732375425eab3ae234718666905f0496bdf