WiFi Unstable - MacBook Pro (16-inch, 2021) - MacOS Monterey 12.6

we can not see your computer, or any messages that show up on your display.

For this reason, the language you use to describe what is happening must be VERY precise, and not ambiguous.

Could you please elaborate what you mean when you say "the address is not stable". IP Address stability is generally not requirement for stability.

generally speaking, you don't connect to a network, use use the network to provide a connection to a particular endpoint device. You can have LOTS of complexity -- multiple switches, Routers, and access points.

Are you using the same network to connect to the camera as you use to connect to the Internet?

100 degrees F is no big deal, that's a little over body temperature.

100 degrees C could indicate a serious hardware problem.

¿which are you seeing?

connecting from your Mac to your phone, or connecting to a local Network Printer or NAS device, or something else?

Packets going toward the internet are sent to the TOPMOST, working interface shown in:

system preferences > networks

provided the camera has a local address, it may (or may not use the "Switch" portion of your Router, but its data will generally NOT be sent onto the Internet to get there. Your Mac looks around over all its interfaces and can find strictly local devices. I mentioned Network Printers and Network Attached Storage (NAS) as common devices.

Your Mac Discovery Protocol, based on IPv6 to do this process.

IPv6:

System Preferences > Network > Wi-Fi > (advanced) >TCP/IP > IPv6 ... to Link-local only

ON may cause routing activity that interferes with your networking. 

OFF will make it hard to find printers and other services on your network.