An IP address in my network doesn't receive any ping request, even if powered on and navigating

Ok so here's the situation: I have a DMZ subnet, x.x.x.x, and this IP address( x.x.x.63 | 255.255.255.0 | gateway x.x.x.1) **fails every ping request** by any other device in the network but still works and navigates. It can ping other devices in the network, but when pinged the request fails.

This is the network configuration: the firewall manages the DMZ which is connected to a VLAN controlled by the router. A laptop is then connected to it with the network configurations stated above. It has no DHCP configured as I need everything to be static.

I've already checked for IP conflict. Setting a different device with this IP address still has the same problems, while giving it a different address (ex. x.x.x.87) and sending ping request works fine. So I suppose it's not a device related problem. The tracert (traceroute) command fails at the very first step.

Went throug and checked the router settings but didn't find anything that seems to be blocking this IP, also in the ARP table this subnet is nowhere to be found.

My colleagues managing the firewall said that they didn't find anything related to this in the configuration.

Has anyone ever had a similar problem?