I have a Netgear wireless router https://www.amazon.com/gp/product/B00EM5UFP4/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Access to the Internet is via this cable modem https://www.amazon.com/gp/product/B00MA5U1FW/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Within the network, the Mac Mini is hardwired to one of the ports on the Netgear. The laptop, iPad, and iPhone mentioned in this thread are all wirelessly connected on the router’s 5G channel.
When the connection problems occur from my Macbook (as they are now), this is what it looks like. It’s been showing this status for about 15 minutes:
When the problems occur from the iPad/iPhone, it just repeatedly tries to connect to the system. At some point it might prompt me to ask if I want to connect to a different server.
No error messages are shown and I’m not aware of any system logs in the Mac app or on the remote apps.
To give you an idea how random the problem is, right now the laptop shows that Initialize status and can’t connect. But my iPhone remote app connects no problem. The iPad just says “Looking for remote libraries”
Here are the firewall settings (note: Plex and Spotify aren’t running; I think RAAT is a Roon app).