There is a bug with the MSI 2019 challinges

Hello there, I was just wondering about a glitch I have been having this past week. Whenever I do my challenges, sometimes(more like always) my progress on the challenges seems to just disappear. And when I complete some challenges and get my rewards, they just go back to the challenge before and remove the loot from my loot. I have completed the "help your team destroy 8 towers" quest about 4 times and got about 400-500 takedowns for the "Welcome to MSI" challenge and gotten nothing. I'm just wondering if there is a fix to this or if someone has experience with this bug.