It has long been said that popular TV show Yellowstone ended over some drama between star Kevin Costner and some of the other people working on the show. Now, Costner has opened up about what truly happened behind the scenes. While promoting another western show, Horizon: An American Saga, Costner decided to answer some questions about what went down while filming Yellowstone. He claimed there was no drama between himself and Taylor Sheridan, as initially reported. It was also previously believed that Costner got in trouble for prioritizing Horizon over Yellowstone, but he claimed this is also…