rain was falling under ground through blocks and in random lines and one of my maps broke and when i went to replace it the lines came up on my maps.

I want to know before the next patch if i have to go to my backup because when i got the back up and convert it again it does the same thing but when i goto 20w16A its fine 

I need help please i have done so much in 20w17a and i dont want to delete it 

in the pics you will see what the maps are ment to look like and what they look like now with the lines and random colours and the random rain under ground