This might not be it, but have you tried a file repair on the launcher? Purple has it right under Start, not sure how it is for Steam users.
#PERSONAL WEEKLY MISSION DONE BUT NOT RECEIVED REWARDS
livid marsh
gritty stag
Hello @fathom drift 
have you completed the weekly quest and claimed the weekly rewards on your other characters?
fathom drift
Hello <@659796659512934400> <:five:1198530595601530971> have you completed the...
no... i only done for this character ,cuz it's my main one >.< , that's why i feel it's a bug ?
fathom drift
stupid as i am , i found out which character. i did received the reward without noticing in my other character , so all solved ....
thank you for replying me and try to help me to solve the problem... cuz it's first time
which just being stupid XD.....