warzone glitched cannot select reqs

so this has happened alot of times in a match of warzone you start earning levels and unlocking ur reqs but it doesent allow you to select any of them , you can select it but it doesent change , it stays on the default weapons all the way and if you quit it you get banned , also if the game finishes it stays frozen in the loading game screen where all the players are waiting for the game to start

It’s been a while since this has happened to me, but when it does it sucks.