Unidentified crashes on iOS

I'm using AR Foundation and latest unity. On android there's 0 crashes, on iOS 50% of users have the app crash in random moments soon after launch. Some of the crashes in crashlytics show this key: CoreUI: deallocating _CUIInternalLinkRendition 205 /System/Library/CoreServices/CoreGlyphs.bundle/Assets.car which is the same for two types of crashes (or at least with different stack traces):
https://pastebin.com/Qb7gJFT9
https://pastebin.com/XNn0dkJD

For most of the crashes there's around 40 mb free memory left on the device.

The main issue is - I can't reproduce this on any of my devices (crashes happen on all devices that support ARKit) and I can't use up even half of the memory, I don't understand how this is at all possible and why Android and the other half of the devices work fine.

Please, help, I'm desperate.

 

anyone?

there's a SO post with no answer: https://stackoverflow.com/questions...allocating-cuiinternallinkrendition-assets-ca

 

@unnanego which version of Unity are you using? I have same crash reports from iOS users on Unity 2019.1.14f1.

 

It's with different ones - I had this last summer on a different project. In this case it was 2019.3.something

 

PLEASE

 

I decreased the sizes of all textures in the build (I had a 8kx8k skybox in the project) and the crashes are gone now. So, check if you have textures larger than 4kx4k (that's a guess, I'm not sure it's what solved the issue).

 

hmm, I have max 2048 textures in my project.

 

look into your memory consumption