Pool utilization shows inaccurate numbers

Setup: Kea DHCPv4. There is a pool with 21 ip addresses to assign dynamically while others are set by reservations.

Stork Server version: 0.18.0 1.0.0

Problem: Stork Server sees only those 21 ip addresses but host reservations are counted in the statistics as well so I get numbers like:

Available: 21
Used: 91

It also affects the Web UI:

I do not have premium hooks installed.