Major FPS drops with some dropped items when using Pure BDcraft resource pack

When I drop certain items with the Pure BDcraft resource pack my game drops FPS. Its not all item just some. If I drop wood I'm fine but if its a full stack of sticks i will drop from stable 60 down to 20, the same happens with a few pieces of rotten flesh too. It happens with a lot of item but not all of them I haven't tested every item. My render distance doesn't effect the FPS drops either. My PC is plenty powerful enough to run Minecraft I have an I58600K, an Nvidia RTX 2070 SUPER, 16GB RAM 3200mhz and Minecart is on an M.2 SSD 970evo by Samsung