Just a heads up, we were using the bitnami charts in our first attempt at an HA postgres instance in our k8s cluster, and we're currently figuring out how to move away from them because they had so many issues.

Granted, we might've messed something up and there are lots of factors, but you should manually check your individual nodes every so often to make sure none of them are going out of sync. Need to connect to each one directly, can't rely on what the bouncer/pgpool/loadbalancer is showing you to check the data is the same. It happened repeatedly to us, and wasn't obvious from any of our monitoring. In the end we had to scale down to 1 node while we sort out moving to a different operator.