Nether update bug : portals wrong coordinates when coming back

Hi Team,

 

I have a nether portal in my house , coordinates 800, 200 that links up to the nether at 105, 39

 

It goes to 105 39 fine, but when i come back, it links back to 900 342 !! 

I tried several times, always the same.

 Also, there are 3 ghasts outside my nether bunker, not ok in normal mode! 

My seed is : 179081109

Please assist

Kind regards

 

Sophie