I'm not sure it's a bug but the Sabyn temple of Almagah (their chief diety) gives a health bonus on the higher construction levels, which is funny since the description says he's primarily a deity connected to agriculture. Wouldn't it make more sense to give the temple of Almagah agricultural bonuses like the Pontic temples of Mithra and move the health bonuses to one of the other Sabaean gods.
Or have you got a fourth Sabaean god planned for the next release?