Not a bug [Indev 0.46.1] Shiny Trainer Pokémon?

[Dupletor]

Unable to reproduce because it can't be re-fought...

 

[Darkfire]

It happens randomly
The chance of an NPC without a set team(i.e. the stats and moves get randomly generated when battling) to have a shiny is the same as a wild encounter
This is a feature

 

[Dupletor]

So it means I lost a shiny encounter? SWEET!!!