Joined in halfway through a Warzone game with Skirmish on Darkstar as the map. My Uncommon Gambit: Assist boost had been chosen. After the game had been found, My Gambit: Assist disappeared. In the end I ranked in the 50% of people to get the most assists in that game, and no XP boost. Furthermore, in some games when you start a new match, the backing audio for the introduction cinematic is inconsistent, sometimes it works, sometimes it doesn't, the voice-over is fine, just the backing track.
Lastly, as a UI error, when you have found a game in either Arena or Warzone, your Spartan on the right side disappears completely, so you cannot change any customisable options such as your colour of your Spartan, your Helmet, Armour, Weapon Skin, (Emblems are fine).
I thank you for taking your time to read this, and I have full confidence that these improvements will be made in the future.