Well firstly, I have One Plus 3 Android phone.

The issue is that monster dungeons (although i've only tested one) will spawn mobs even when the room is really well lit.

What i've expected:
Well, since ive claimed the dungeon in the official release, i can go there without worrying that i will be attacked by mobs, due to it being well lit.

What happend:
When walking upon the monster dungeon, i was greeted by 4 skeletons who have just spawned in. This should not happened, due to it being lit.

Steps to reproduce it
1. Set your diffuculty other than peaceful
2. Create a world
3.Find a dungeon(or for the people at Mojang, use the awsome magic of spawning in one.)
4. Claim it by puting torch around the place.
5.If you still have mobs spawning. Congrats it worked

I have provided a YouTube video link for this
https://www.youtube.com/watch?v=Zplk_rm-76o

This just explains what happend, but with no sound