1+1 on fire morale reward

[Never]

I claimed the 1+1 on fire reward (premium) and didn’t get the +1. I had 5 players on fire before then after claiming I still had 5 players only on fire.

Thats not a bug . For players that are already on fire you get no one extra +1 after claiming the reward.
It works only for new players who get on fire after claiming.
Then you get the +1