When i firstly came in this dimension didnt notice nothing bad. Then i noticed that mobs from this dimension do not spawn at all. I thought it might be some mods conflict, so i deleted some (Better Animals). It was promising at first, mobs started spawning but very rarely. I tried to delete Eden files from minecraft directory but everything was the same, i tried to change the edens biome ID but nothing would work. And then i noticed that im not in the Eden biome only, cause of the skybox is changing colors. When I pressed F3 i saw that every couple blocks biome is changing from Eden to Plains. I tried everything that i can do myself, searched all the internet but i can't find fixes to my issue. Anyone willing to help or know how to fix this?
Minecraft versoin 1.12.2
DivineRPG version 1.7.1

Eden biome:

Plains biome: