Which version of babylonReactNative are you using?
Do you get the issue when you disable Metal Validation?
It’s difficult to have an opinion on the issue without a repro.
Can you upload at least your typescript files?
What are the babylon.js features you are using?
Without a repro, it will be close to impossible to figure it out.
I would suggest to try to reduce your code until the minimal configuration for a crash is achieved, and then, you find the set of actions that leads to a crash or you manage to do a repro .js.