I wanted to add that there are no other wifi networks within range of my network. Literally zero interferance with a wifi tester. 

I spent the entire day troubleshooting and testing different configurations. I ended up going back to my old router for network configuration and switching the Decos into AP mode. This allowed the WiFi to be more stable and allow the cameras to stay connected. I'm still testing but so far so good. Will report back if anything changes. 

Nevermind, it's still not working correctly.  The connection becomes unstable overtime. About once every few hours I have to restart the deco network and it works fine but slowly starts to degrade. The amount of effort I have put into these to get a basic stable wifi connection has reached a threshold and I'm going to just give them away and go with a different solution. 

  @DecoUser23 I just "upgraded" from Google Nests to the Deco XE75 a couple days ago and am having the exact same issues.  It's not just my cameras; there are a number of other devices that can't connect or are intermittent, including thermostats and a power monitor.  I've create the IoT network with only 2.4GHz and WPA2 security and that hasn't resolved it.  I suspect it has something to do with the security setup but I can't find anything in the documentation or online.  It's a shame because the coverage and speed we're getting on our phones and computers is a huge improvement, but other wireless devices not so much.  I'm not quite ready to return this because it's too painful to think about setting up the old system again, so hopefully someone has some other ideas.

  @Hardebeck you might consider trying AP mode with an alternative router solution. It definitely made mine stable for longer but with the full network up it's still unstable. 

  @DecoUser23 I don't want to go the mix and match route, having lived with that in the past. If I can't get this to work soon, I'll be returning them and I'll try another manufacturer.  Would be a shame but if TP-Link won't support this, I'd rather find out while I'm still in the return window.