This shape of pasta easily nests inside each other. A lot of times if you just pour it directly from the bag/box into boiling water, you will get stacks of them together.
Once they are cooking this way it is a major endeavor to separate them. The pasta won't cook evenly because they are stacked together. The ones stacked in the middle will have more al dente centers.
How do we prevent this? (One way is to make sure they are separated before entering the water.
Once they start cooking and some of them are stacked, what is the best way to separate them?