Over the last week or two I have come across all sorts of settings that might have some influence on what you are seeing.
Can you concentrate on just one of those cameras and let us know what it is doing and how often it does it. Do you have smart connect enabled?
There are settings which determine what the minimum signal strength for a device to stay connect, there are power management frames options that may keep a device from connecting.
I had a device that was trying to connect every 11 seconds but it did not have the updated password.. It seems yours connect for some time then disconnect so is there any time that repeats with that process?
Have you tried moving one of the cameras to a position where you knew the signal strength was sufficient and see if it would stabilize?
Do the cameras come with their own software or do they just use Win 10? The specs say they are WEP, WPA/WPA2 security.
Do they communicate through some device like Alexa?
Maximus Z790 Hero,
Intel i9-13900k
Intel BE200