Core connection problem after moving

Have similar issues. Recently moved house and got new broadband, router etc. Some of my devices like laptop, ipod etc can find my core no problem but phone(android) can’t. Core is connected directly to router with cat8.
It’s really annoying as most of the time I’ve been using my phone as a remote. Earlier on today it did find the core and I could connect but few hours later all gone again.
Ps.
I don’t know how many times I’ve been restarting everything already so don’t think it’s the case
Ps2.
My core runs on roon rock distro so no chance of antivirus etc

Hi @Lukasz_Domagala,

Welcome to the forum!

Can you please provide some more details regarding your setup as per this guide?

Please be as detailed as you can regarding your network setup, I would like to know model/manufacturer of your gear and how the Core and Android fit into the setup.

Thanks!