Bitcoin miners sometimes produce blocks which causes one of the blocks to be orphaned. In this we we explain that process. Get blockchain certified: https://academy.ivanontech.com join 20,000 students. Bitcoin is a decentralised network of computers which means that there is no central coordination of block production. Miners produce blocks as fast as they can and therefore it’s natural that sometimes two blocks will be produced at the same time.
Orphan blocks are sometimes called stale blocks.