As the title suggests, textures made using the texture object don’t show at all on mobile devices, at least on 3 different Android tablets that I tested on, but it must be the case for all.
Example texture: rbxasset://textures/water/normal_21.dds
I will bump this in the new year. Just want to post this before I forget.
Adding onto that, if you select a group of objects and copy paste them into another object, and a Texture object was among the selection, only the texture object will be added.