Have you received a Full Rare titan an another alliance in the last 12 days ?
Were you in different alliance when the rare titan was Appeared in your current alliance ?
If the answer is yes to any of these, then you will get a Reduced Rare Titan loot.
Otherwise you should get a full loot, and it is a bug if you have not receive it.
There is discussion about this in another topic in the last few days:
