@Wayne-TP Thanks for the reply.

 

So I have the following hardware:

 

1) a brand new TP-Link AX55 Wifi 6 Router. Introducing this to the network is what seems to have broken everything else. This is my main wifi network at my company. I noticed that rather than make 2.4 and 5 ghz separate networks, it just makes one seemingly combined one, which seems odd, compatibility-wise.

2) I have a Home Network with separate 2.4 and 5 ghz versions. I tried connecting the P105's through the 2.4 Home network and it worked well...but accessing while connected to any other wifi network (say, my work one), causes devices to disappear from the network. If I connect just to the base station the P105 is on, it shows up. I have verified that this network connects fine

3) When I was using my old Airport Base Station things seemed to be more stable and compatible, so I brought it out and set up a new network to test. Same results as the 2.4 GHz home network though (device disappears if I'm not connected to the exact same network).

4) Most important of all, my plugs, which are properly tied to a 2.4 GHz network that can definitely, absolutely connect to the wider Internet, when I test it through a Mac or iOS device. But when I connect with no wifi (i.e. from the outside world, trying to reboot my all-important work computer of it has crashed), the devices disappear immediately.

 

 

Incidentally, every time I load the Tapo app it reports that my network in unstable, despite the network serving me well for years and years. I have no idea why this would be so, and the plug is about 6 feet (through a thin wall) away from the wifi it's connecting to. 

 

I tried to upload before and after images but this image board seems to have an error, it asks for the upload URL even though I'm trying to manually upload.

 

I'd really like to use these plugs, but the issue needs to be solved before I can consider it. Please help!

Also sorry for not giving the info you asked. The office is my physical company about 200m from my home. The office network runs on the TP-Link Ax55, and it's for inside the company, while the home network connected via ethernet to an ASUS RT-AX55. (It's hilarious that both devices have nearly the same product names but are definitely different products.) There is nothing blocking the switches from the Internet. If they needed a port opened in the internet box or something, that's not something I've ever done in a dozen year of using these devices. I've tried connecting the TP plugs to my IoT network (2.4 ghz), my Home Network (2.4 ghz) and my Old Network (also 2.4 GHz). All connect to the app cheerfully but are only visible if I'm connected to that exact wifi network.