I have installed an OMV 5 machine from scratch recently and at the beginning it had only a dynamic ip address given from my router, 192.168.22.166 - which was fine.
Then I changed the Ip to "static": 192.168.22.3 - and now I can reach the machine via both addresses!
That should not be because it uses up too much address space...
What can I do?
So far, I don't remember a IPv4 Ethernet could have two IPs of the same subnet at the same time.
If it's a feature, I think OMV should offer a way to turn off the DHCP address.