Skeletons keep on spawning above bed

This is the old (2014-2015) version of Minecraft Xbox, I may even forget some details as this was long ago

There is a house at the back of the Village and a bed is contained inside. However a skeleton keeps on spawning on top of the bed. The weird thing is, it keeps on repeating. I sleep, skeleton spawns, I kill skeleton, I sleep and the same loop is repeated.

So...

What is this strange phenomenon

I would also like to add that it seems to only happen at that house

Solution 1:

• Is the house properly lit?
• Is there a cave right underneath it? (you gotta dig under and find out)
• Is there a mob spawner underneath it? (you gotta dig under and find out)

• Is the roof made out of half-slabs? - Make it out of stairs instead.

• Last but not least, nuke it with DYNAMITE, that'll sure fix all your problems as there won't be a house (or bed) to worry about...