Slime Chunks have moved since 1.6 update

Realm:  Tern's Land

My Xbox Gamer Tag is Stevie The DJ

Nintendo User: Stevienz

I have noticed slime spawning outside of the chunks since the 1.6 update. 

I have been clearing an approx 200x200 area down to Y39. Prior to the 1.6 update I used the tool available at  https://depressed-pho.github.io/slime-finder-pe/ to identify and stop surface spawns in many of the chunks to that I can have them spawning where I have collection areas. 

I had no issues with any slime spawns when I carpeted the slime chunks. However they have now started to randomly spawn in chunks that are not slime chunks according to the tool above. Prior to the update I didnt have any problems with the mentioned areas either. 

Can you please advise if this an intended change or a bug. Thanks.