Chunk Problems

i was rendering new chunks and had many awkward chunk seperations. and biome problems. The uploaded picture just shows one direction of the area. but all 4 cardinal directions had random spots of chunk problems.
after exploring more area i have noticed our spawn point moved. our initial spawn point was on a swampland biome. but the compass pointed me to a forest. there was aproximatly 1000 blocks apart from the 2 spawn points. i tested the new spawn by removing my bed and going through the end portal to the overworld. and i spawned in the forest. 2 pictures of our spawn point have been uploaded as well. picture with a nether portal is our spawn point that rendered initially with the world. the forest is the second spawn point.

the world seed is -966717283730376500