ARC on Android Can't Find Roon Core [Ticket In]

[danny2]

@connor

• Who is your internet service provider?
  Local phone company, Bezeq. ADSL
• Please list the make and model of your modem and router?
  Linksys ACS1900
• Do you have any additional network hardware, like additional routers or managed switches?
  Switch TP Link TL SG1008
• Does your network have any VPNs, proxy servers, or enterprise-grade security?
  No.
• What machine are you using as a Roon Core, and how is it connected to the internet?
  Windows 11 i7 11K processor

Roon says ARC is ready and working on my server, ready to connect. No error message.

On my android phone, the ARC app is just “searching” and never finds the core.

Tried with and without adding a specific port forwarding line for 550000, didn’t help.