Completing the raid

Hey I'm just wondering something right now. So after we do the raid once, can you get awarded again for completing or do you have to wait a week? I am asking this because yesterday I did it twice. Of course the first time I did it I got rewarded with the chests and the bosses, but the second time I didn't even get anything rewarded even the final boss didn't give me anything. I'm wondering if this is a bug that recently wasn't fixed after the patch or do I have to wait a time limit to get awarded again. Thanks for reading and i hope to get help on this issue.