Modifying pools using the subnetX_update commands does not update statistics

I tested the latest addition to Stork - pools management. I had a subnet without pools initially. I added some address pools to the subnet and saved the changes. It results in sending subnet4_update followed by config-write. The statistics (in particular total-addresses counter) has not been changed to reflect the new pools capacity. I am able to force recounting the statistics by sending the config-reload command, but that's not how it is supposed to work.