Entering same room ID on local and remote device doesn't result in devices seeing each other

Describe the bug When using PairDrop from a machine on it's local network and a machine from the outside, entering the same public room ID on both does not result in the machines seeing each other.

To Reproduce Steps to reproduce the behavior:

• Install PairDrop behind a reverse proxy(Sophos WAF in this case)
• Open PairDrop on a machine from the Internet (Public IP correctly detected)
• Open PairDrop on a machine internally (Private IP correctly detected, app reports using 127.0.0.1)
• Create a room and enter the room code on both devices

Expected behavior A clear and concise description of what you expected to happen. The devices see each other and can transfer files despite being on different networks

Desktop (please complete the following information):

• OS: Windows 11, Windows 10
• Browser Edge, Firefox

Bug occurs on official PairDrop instance https://pairdrop.net/ No Version: v1.11.2

Bug occurs on self-hosted PairDrop instance Yes

Self-Hosted Setup Proxy: Sophos WAF Deployment: community-scripts.org LXC on Proxmox VE Version: v1.11.2