The dhcp server just stops giving out addresses and some clients have ip address others don't .
Only when fresh install of a rolling release it works ,but upgrading it breaks dhcp server tried with many versions since 2 weeks
Also here is the status
Admin@vyos:~$ show dhcp server leases
WARNING: DHCP server is configured but not started. Data may be stale.
IP Address MAC address State Lease start Lease expiration Remaining Pool Hostname Origin
------------ ------------- ------- ------------- ------------------ ----------- ------ ---------- --------