iOS filament crash

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**Describe the bug**
Open the addresses sanitizer and find that the filament crashes;

**To Reproduce**
Steps to reproduce the behavior:
1. Open the addresses sanitizer

**Expected behavior**
filament runs normally

**Screenshots**

**Logs**
If applicable, copy **full** logs from your console here. Please *do not*
use screenshots of logs, copy them as text, use gist or attach an *uncompressed* file.

**Desktop (please complete the following information):**
- OS: [e.g. iOS]
- GPU: [e.g. NVIDIA GTX 1080]
- Backend: [OpenGL/Vulkan]

**Smartphone (please complete the following information):**
- Device: [e.g. Pixel 2]
- OS: [e.g. Android Pie 9.0]

**Additional context**
Add any other context about the problem here.