In the new Galactic Challenge, I completed the Tier X several times with different teams, but the feat isn't being validated. However, it did work for the first two tiers when I used my 3-stars ...
Ideas
The galactic challenge is now over, and I wasn't able to complete the feat.
The new one is working very well, but I hope I can get some compensation for the rewards I missed in the previous one...
EA_Gunner please