iOS - app crashes when plugin stop is called

[ygyg70]

Describe the bug App crashes when plugin stop is called The crash report + a fix proposed by AI are included with this pull request: pull request with crash report

To Reproduce Steps to reproduce the behavior:

1. Start camera preview
2. Stop camera preview

Expected behavior Camera preview stop should never cause the app to crash

Smartphone (please complete the following information):

• Device: iPhone13,1
• OS: iPhone OS 18.3.1