Question on Ratio Load Balancing Method

Hey, AlexBCT  I have a good question for you if we use Global Availability as the preferred load balancing method. My question is if the first pool member is marked down(failed), it will indeed go all (100% of traffic) to the second pool member, what will happen if the first pool member recovers (pass the health check, and is marked as healthy)? Is the first pool will take over? or traffic will keep sending to the second pool?

Thanks in advance!