In general - when the ball is loose you can have a lot of contact diving for the ball. As at any other time, you can't stop an opponent from trying for it, but you can crash with one player getting the worst of it (even, knocked out) with no foul.
Folks forget that it isn't the amount of contact that determines the foul, only how, when, where and the type of contact.
Based on the reported facts, the only possible foul calls would be if it was judged that the player deliberately was trying to injure (unlikely) or ignored the dead ball whistle (too bang / bang of a play).