Path of Exile 2 Difficulty Chapter 1 Survival Ritual - Candlelight Reward Error Issue

The system shows that the reward is 8%, but I actually received 5%. As shown in the picture, I am a Chinese player. Use the translation when posting.The game reward data pictures can't be sent out.I want to know the reason. Is it a bug? Can it be fixed? If so, please fix it as soon as possible.