DHCPDISCOVER DHCPOFFER loop

Hi, after installing OpenWRT on my Xiaomi AC2350 router, both my tv-boxes can't connect to wi-fi. In system log it's stuck at DHCPDISCOVER DHCPOFFER without REQUEST. I use default setting. All other devices connect and work normally. Any suggestion?

A piece of system log:

Thu Aug 26 19:30:07 2021 daemon.info hostapd: wlan1: STA 08:da:35:df:c4:96 IEEE 802.11: disassociated
Thu Aug 26 19:30:07 2021 daemon.info hostapd: wlan1: STA 08:da:35:df:c4:96 IEEE 802.11: authenticated
Thu Aug 26 19:30:07 2021 daemon.info hostapd: wlan1: STA 08:da:35:df:c4:96 IEEE 802.11: associated (aid 1)
Thu Aug 26 19:30:07 2021 daemon.notice hostapd: wlan1: AP-STA-CONNECTED 08:da:35:df:c4:96
Thu Aug 26 19:30:07 2021 daemon.info hostapd: wlan1: STA 08:da:35:df:c4:96 WPA: pairwise key handshake completed (RSN)
Thu Aug 26 19:30:07 2021 daemon.notice hostapd: wlan1: EAPOL-4WAY-HS-COMPLETED 08:da:35:df:c4:96
Thu Aug 26 19:30:08 2021 daemon.info dnsmasq-dhcp[2811]: DHCPDISCOVER(br-lan) 08:da:35:df:c4:96
Thu Aug 26 19:30:08 2021 daemon.info dnsmasq-dhcp[2811]: DHCPOFFER(br-lan) 192.168.1.193 08:da:35:df:c4:96
Thu Aug 26 19:30:09 2021 daemon.info dnsmasq-dhcp[2811]: DHCPDISCOVER(br-lan) 08:da:35:df:c4:96
Thu Aug 26 19:30:09 2021 daemon.info dnsmasq-dhcp[2811]: DHCPOFFER(br-lan) 192.168.1.193 08:da:35:df:c4:96
Thu Aug 26 19:30:10 2021 daemon.info dnsmasq-dhcp[2811]: DHCPDISCOVER(br-lan) 08:da:35:df:c4:96
Thu Aug 26 19:30:10 2021 daemon.info dnsmasq-dhcp[2811]: DHCPOFFER(br-lan) 192.168.1.193 08:da:35:df:c4:96
Thu Aug 26 19:30:12 2021 daemon.info dnsmasq-dhcp[2811]: DHCPDISCOVER(br-lan) 08:da:35:df:c4:96
Thu Aug 26 19:30:12 2021 daemon.info dnsmasq-dhcp[2811]: DHCPOFFER(br-lan) 192.168.1.193 08:da:35:df:c4:96
Thu Aug 26 19:30:13 2021 daemon.info dnsmasq-dhcp[2811]: DHCPDISCOVER(br-lan) 08:da:35:df:c4:96
Thu Aug 26 19:30:13 2021 daemon.info dnsmasq-dhcp[2811]: DHCPOFFER(br-lan) 192.168.1.193 08:da:35:df:c4:96