Calculate smooth normals freezes app 0.9 iOS

[cyberneel]

ArmorPaint version:

600d7c7

OS / GPU model: iPadOS, iPad Air 5th gen M1

Issue description: When calculating normals smooth, the app freezes and reopens default scene with cube.

Steps to reproduce:

Import a custom mesh, mine was 40k quads, and calculate smooth normal in mesh tab.