No XP Progression On Classes/Heroes/Vehicles/Etc At End Of Match Bug

Randomness is the odd ball here.
What is your Platform? Try a hard boot right after it happens. Give it 10 minutes after the last match and try again. If not points again, then you are not the problem. It also might be the screen is showing 0, but note the character stats in collection screen before and after the round. Might be getting there, but not showing up in the EOR screen.