Different behavior about joint index and lighting on Android

Everything is ok when joint index is set to <74.  I thought 74 may be a hardware-related param on my device or something.

However,  when joint index is set to >=74, target model with NoLighting material can be rendered normally but cant't be rendered with normal Lighting material.

Two key lines in example:

line 19:                index: 74

line 77:                lighting: PrincipledMaterial.NoLighting

In another official example "skinning", the unique joint index is 72.