Biomes corrupt in 20w28a

So i have a nether survival world, and we updated to 20w28a, we were on 1.16.1 before. After loading in the world, The biomes randomly change and the particles and mobs do not match the biome, and in F3 mode it says "basalt delta" in a crimson forest, "crimson forest" in a warped forest, and its all messed up and random, there are also random air hitboxes. I spent 2 hours in this world before i realised it was broken, is there a way to fix this? or in the full release of 1.16.2 will it repair this? I am really hoping so.