How to reproduce:
1. Open the attached project form the link provided in the Edit section
2. Build for iOS and deploy the Xcode project to the iOS device
===Crash occurs in about 1min ===

Reproducible with: 2019.2.0b9, 2019.2.21f1

Reproducible with:
iPhone SE (iOS 11.4.1)
iPhone 6 (iOS 12.2
Ipnone 7 (12.3.1)

Not reproducible with:
iPhone 8 Plus (iOS 12.2)
iPhone X (iOS 11.3.1)

Notes: Could not test on earlier or higher versions because of the thrown errors
Build fails for Android

Few first lines of a stack trace:
frame #0: 0x000000010479abdc h4kdev`::CalculateBlendShapeWeights() at MeshBlendShaping.cpp:109:28 [opt]
frame #1: 0x000000010479adb8 h4kdev`::ApplyBlendShapes() at MeshBlendShaping.cpp:147:5 [opt]
frame #2: 0x000000010478b214 h4kdev`::DeformSkinnedMesh() at MeshSkinning.cpp:195:9 [opt]
frame #3: 0x000000010478b2dc h4kdev`::DeformSkinnedMeshJob() at MeshSkinning.cpp:218:5 [opt]
frame #4: 0x00000001047b65b0 h4kdev`::Exec() [inlined] ExecuteJobFunc at JobQueue.cpp:393:9 [opt]