Literally just finish a battle a second ago and it did not count any of my kill for the event but it used my booster and give me squad xp? bruh.
The issues have been reported to our OPS team, it is a widespread issue right now.
UPDATE: Might be fixed already, restarting your game should give you the missed rewards. Devs are still looking it.
yep just got it right after the 2nd game