DHCP doesn't work for blue clients (hostapd)

My well tested gateway with IPFire died, SSD failure. No backup (I cannot find it)… I will try to recover configuration from broken SSD.

I had similar hardware (a test machine for IPfire) so I updated IPfire to the latest version (200) and it works on green, my lab is connected to the internet.

I cannot find what is wrong with blue network (hostapd, PCI WiFi card). It seems that clients can connect to the AP but they disconnect after a minute because no IP address is assigned from DHCP server. Blue network is enabled in DHCP server. MAC filtering is disabled in Blue access. I just cannot find the reason why my basic setup is not working.

I see in /var/log/messages that client is connected but I cannot find any message from DHCP server for blue interface, only for green.

Apr  6 23:38:13 firegate hostapd: blue0: AP-STA-CONNECTED 14:13:33:9a:dd:3c
Apr  6 23:38:13 firegate hostapd: blue0: EAPOL-4WAY-HS-COMPLETED 14:13:33:9a:dd:3c

DHCP is configured for green and blue networks:

[root@firegate log]# ps aux | grep dhcp
root      2395  0.0  0.1   9428  6752 ?        Ss   15:06   0:03 /usr/sbin/dhcpd -q green0 blue0
root      2404  0.0  0.3 165076 13412 ?        Sl   15:06   0:02 /usr/bin/python3 /usr/sbin/unbound-dhcp-leases-bridge -d
root     32065 33.3  0.0   6868  2624 pts/1    S+   23:58   0:00 grep dhcp

UPDATE. I rebooted gateway and after reboot blue network works, I see in /var/log/messages that IP addresses are assigned to blue clients. I spent more than hour to troubleshoot this issue and one reboot fixed it. That is a mystery… It was rebooted several hours ago after update to version 200 and after that I changed SSID and WiFi password. Still one more reboot was needed. This proofs that configuration was correct but there is some internal issue in the gateway code.