Assigned IP doesn't work properly

I bought a dedicated server through PhoenixNap in August of last year. Since day one, one of my IPs hasn't worked. I have the range of x.x.x.130-134 and 131 has never worked. At first, I contacted them and they relayed that it isn't an issue with their network and is instead an issue on my issue. The only thing is I can seem to find what would be causing this. The IP is assigned in a netplan, the firewall isn't blocking that IP specifically, and I've checked everything under the sun. Granted I'm not a great sysadmin nor do I do this professionally. I simply bought a dedicated server to host a few game servers on and I'd really like to use my 5th IP if I could.

Any tips/help is greatly appreciated. I've looked everywhere I can personally think of but I know there's probably something stupidly simple that I'm overlooking. Below is my netplan config and the interface's output, with IPs redacted obviously.

network:
 version: 2
 renderer: networkd
 ethernets:
  enp1s0f1:
   dhcp4: no
   addresses: [ IP4(.134)/29, IP3(.131)/29, IP2(.132)/29, BROKE_IP(.131)/29, IP1(.130)/29 ]
   gateway4: GATEWAY_IP
   nameservers:
    addresses: [ 1.1.1.1, 1.0.0.1 ]
~                                        

enp1s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 3c:ec:ef:38:00:91 brd ff:ff:ff:ff:ff:ff
    inet X.X.X.134/29 brd X.X.X.135 scope global enp1s0f1
       valid_lft forever preferred_lft forever
    inet X.X.X.133/29 brd X.X.X.135 scope global secondary enp1s0f1
       valid_lft forever preferred_lft forever
    inet X.X.X.132/29 brd X.X.X.135 scope global secondary enp1s0f1
       valid_lft forever preferred_lft forever
    inet X.X.X.130/29 brd X.X.X.135 scope global secondary enp1s0f1
       valid_lft forever preferred_lft forever
    inet X.X.X.131/29 brd X.X.X.135 scope global secondary enp1s0f1
       valid_lft forever preferred_lft forever