If you use dhcp static leases they are not visible in
```
show dhcp server leases state all
```
but if enabled dhcp monitoring you can see there
eg.
```
DHCP: Dynamic and static leases present for 192.168.10.136. DHCP: Remove host declaration LAN10_host2 or remove 192.168.10.136 DHCP: from the dynamic address pool for LAN10 DHCP: uid lease 192.168.10.51 for client 00:0c:29:xx:xx:2d is duplicate on LAN10 DHCP: DHCPREQUEST for 192.168.10.136 from 00:0c:29:xx:xx:2d via eth1 DHCP: DHCPACK on 192.168.10.136 to 00:0c:29:xx:xx:2d via eth1
```
reserved lease could be good solution for this also
On ISC DHCP manual this is explained
https://kb.isc.org/docs/isc-dhcp-44-manual-pages-dhcpdconf#reserved-leases
If I understood correctly, reserved lease support could help to have more transparency and the logic of working would be more straight forward. Would be good feature to have and I know at leaste one more person than me that would benefit on this. :)
A feature request is always the proper start for any new features or behavior changes. In short: if everyone is happy with the fixed-address - there are no obvious reasons to change anything. Your case is one of the hidden pitfalls that most do not see, and can be used as an example and argument for the improvement that will bring better DHCP for everyone. If this is possible, of course. :)
this is my first feature to suggest, so might contain weirdness.