OSC connectivity on Windows

Hey all,

I am using the OSC server on UE4.26 and 5.1 to communicate in/out of UE on a plugin I am selling.

Binding it this way:

On some computers, the OSC communication won’t work on the packaged .EXE

The server/client are running on ports 7000+7001
I tried the classic solutions like excluding the .exe from the Firewall but no luck.

Has anyone experienced any similar issue? sounds like something is blocking communication but no idea what.
The issues are not happening on my own system so it’s a bit hard for me to troubleshoot, though I’d love some insight/ideas so I can suggest them to my users.

Thanks a lot