I’ve seen mixed results with fixed leases that I’m trying to figure out. Sometimes it seems like they “stick”, but other times they clearly do not. I’m on core 169 and this is what my DHCP page looks like right now. Am I doing something wrong?
My guess is the old lease has not expired and possibly keep renewing it self.
Assuming you rebooted your devices to get new fixed lease?
You can try this to clear the lease table.
Perhaps not the best solution.