You have an special configuration.
Are you reserving IPs in block section for forwarding, as example for VPN? That either the DHCP Server own IP must be in that block section of range? For me unusual to set DHCP Server and green/blue eth network with xxx.xxx.1.254/16. Therefore I wrote check IP range. Yes I thought so, that you have further clients out of DHCP and out of Box reach. I think in isolation.
No. At all DHCP Servers that I had configured, that was not the result.
Because you wrote that everything works fine, I suggest to keep it as it is… as long you know all your IP ranges and the network clients makes no conflict and the linux kernel runs with this settings.
sorry, my Englich is not good. And the translater is worst too.
BR
Trash