WoT Blitz mission reward not received??

Hey everybody (this is my first post and I'm new to the TITAN clan),

Just a quick question to all World of Tank Blitz-ers out there, have your missions rewards not been working recently? 

It appears to have happened to me... I complete the mission requirements yet I do not get my reward!! :O

*slowly inhales*

Sometimes this happens, sometimes this does not.

I have a TOG submarine, and a mission required me to earn 5,000 XP over any number of battles. Surely I did, as the bar was filled to the max (on te mission card). However, I did not receive my 1,500 free XP!! (I remembered I had just over 70,000 free XP before finishing the mission. I still had the same amount after finishing.)

*slowly exhales*

I hope someone out here can help me with my problem :)

My WoTB username is "veetoh_wong" and I play on the NA server.

Thanks and I hope to see you guys on the battlefield!

Roll out!! o7