Sounds to me like too much texting here and not enough face to face talking. I know from a bad roommmate situation I went through with my daughter- these kids rely way too much on texting because it’s easier. But texting lends itself to misunderstandings. They should have a sit-down over pizza or coffee and talk to each other. Many dorms require roommates to sit down together and fill out a standard roommate agreement during the first week for exactly this reason.