Azure Frontdoor - backend pool with app gateway

Hi,

We have front door backend pool with app gateway backends added with 50% weight each on eastus2 and centralus gateways.  Though the weight is 50 on each, I am seeing most of the calls getting directed to EastUS2.  And observing latency in the response time in the source system where these calls are made.  Any thoughts why the traffic is not getting directed equally but almost 80% going to EastUS2?