Banishment system problem

Hello, following a guy on twitch, I notice a concern with the banishing system.
The player in question 3 times in the evening he starts a match in 3 vs 4. Whenever he is found to start a match in 3 vs 4 he has left. Which seems to me to be legitimate.
The third time he left he found himself banished for about ten minutes. I do not think it’s normal.
I have not been confronted with this problem directly, but I would not appreciate it happening to me.
I share the link of the match where it is banished below.


For any and all ban-related questions/comments, please use the Halo 5 ban megathread. A link can be found in my forum signature.