Halo 5 has countless of bugs. most i have ever seen in a game. It will be realy sad if there not fixed in the next update
https://www.halowaypoint.com/en-us/forums/e0d9938206f04a598ce84f2c8cadce02/topics
Please, post any unreported bugs in the Support forums. You may also use the search bar to find/constructively contribute to known issues.