Terrain Corruption?

Whenever I try to make a new world or go to my old worlds, there seems to be a problem with the world itself. For example when I checked the cloud islands, the ore that Remnants add, Stellar Fragments turn into Pyramid blocks and whenever I try to go down a jungle dungeon it crashes my game with wrongly generated terrain. I setup a new modpack that had 3 mods that affect the terrain generation. (Plentiful Ores, Calamity/WotG/HotOG and Remnants.) Which messed up the Chlorophyte generation all together?? The compatibility was fine within these 3 mods but after a week of not playing and coming back, now I see this happen. (please ignore the texture pack that I have at the moment)