Unless Campolattano is deliberately twisting Morgan McIntosh's ankle, injuries are pretty much random.
Therefore they're most likely to happen in practice, simply because of the amount of time spent in practice vs the 7 minutes in a match. Even with guys going less than full speed and letting up.
The next most likely is in a tournament with multiple matches in a day. Some due to the wear and tear within the day with less recovery, and some due to either guy's technique and balance faltering when tired.
If intensity and competition level were really causes, then it's hard to explain Zain Retherford beating up everyone and yet never injuring anyone, not even Malik Amine.