[openstack][kolla-ansible][neutron] router ha was split brain when restarting l3 agent docker

Hello., I deploy a multi node cluster with 2 network nodes separately with l3_ha=true and max_l3_agents_per_router=2. It is ok but when I restart neutron_l3_agent on a host which has an active router then 2 routers become standby-standby or active-active. I feel 2 network nodes very easily to split brain. Could I have some ideas on this problem. Thank you. openstack 2025.1-master kolla-ansible2025.1 master ubuntu 22.04 Nguyen Huu Khoi