zombie spawner turned into pig spawner

I had setup a zombie 2 hit kill spawner drop a while ago (2 months ago) and I have dutifully applied each update, but this last update with end cities has turned my zombie spawner into a pig spawner. I have tried switching to creative, applying a zobie egg,
but everytime I reload into survival ito switched back to pig either right away or after a save / reload. I did not want ot switch to creative and lose my achievements but had no choice since I could not undo the problem any other way, but the problem persists,
and I searched on the support here and it seems I am an oddball and there is no easy solution. Is this a real bug?

:)

 

Spawner problem

I play minecraft on Xbox one. before title update 46 someone found a zombie spawner in my world. I turned the zombie spawner into a zombie mob grinder. Title update 46 came out after title update 46 came out and now the instead of the zombie mob grinder
it changed into a spider spawner. Is there any way to change this back? Thank you.

 

Minecraft

hi I play minecraft on Xbox one and I have a problem. Before TU 46 someone found a zombie spawner in my world and I turned that zombie spawner into a zombie mob grinder. But when TU 46 came out there was a bug that turned all the monster Spawners into pig
Spawners but when TU 47 came out that bug got fixed but the zombie Spawner got changed into a spider spawner. And you see that's a big problem for me because that mob grinder doesn't work anymore because it was built for zombies not spiders and you might be
thinking what's the problem the problem is zombies are two blocks tall in minecraft and spiders are three blocks wide so the spiders don't fit through the holes in the mob grinder. The other big problem with this is in TU 46 there's this new enchantment that
allows you to repair your tools and armor with xp and this zombie mob grinder was my only source of xp in my world. So what I'm asking is there a way to turn the spider spawner back into a zombie spawner. So if there's a way to do that then thank you and whenever
you answer I will give you the seed to my world and the coordinates to where the zombie spawner should be. If you can't help me then can you tell me who I have to contact. I had contacted mojang before and they said they only do billing now. Please help
with a solution rather than contact someone else.