In repl_monitor_refresh.js, we start a sharding test with 1 shard that specifies 3 nodes. With auto-bootstrap, there is an auto initialization in the beginning which makes it necessary to be a reconfig when there are particular setting specified(like number of nodes). Mongos needs to update the config server on a topology state change so change the assert here to be an assert.soon in the case that mongos is a bit slow triggering the update.