If a player has a ton of assists it is often a sign that their home stat crew is awarding two assists rather than solo+assist whenever two players are involved in a tackle, and only awarding solos if the player is alone at the time,
I can't recall how Cleveland's stat crew is, and don't have my notes with me, but skim a few recent game logs and see how often you see Player1, Player2 (tackle, assist) rather than Player 1; Player2 (2 assists, no solo). If the latter is typical, this won't likely get better. Especially with athletic guys like Collins who will be around the ball a lot grabbing the other half of Scobert's potential solos.