We have 4x cameras (2 of the stated TC71, 1x C211 & 1x TC60) all on the same fixed home wifi network.

Early in August of this year I started with the TC60, the a few weeks later added the 2x TC71 units, and finally about 4 weeks ago I added the C211.

These have all worked fine. I have had full control of them thru the app while away from home via my mobile network.

(Tho I am abe to overlook the occasional false alert because of wind blowing the pot plants..)

2 days ago, I got a notification to update one of my TC71 units. There was no option to opt out. 

Since then,. I am unable to connect to my cameras via the app when I am away from home.

They will only connect to the app when I am on the same wifi network. Which is silly, and effectively useless.

My girlfriend has the app on her phone too and gives the same results.

This is new and unwanted behaviour. 

I have looked thru all the settings and I cannot see anything that cause(s) this.

I have done some googling and the results were very generic and I have tried practically everything mentioned.

I have "removed" a camera from the app and reset/rebooted and reconnected the camera to the app and everything went smoothly but did not fix the issue.

I wish to clarify, itr is affecting EVERY camera on my network and BOTH mobile phone's apps connected to the network.

Our router is not displaying any signs of issue. Our robovac and smart lights all work as expected.

As does the wireless connections to our PCs and Smart TV.

The cameras worked fine for several months and then simply stopped.

I do read of one thing I've not tried. Something about resetting our router DNS, something-or-other.

Why should this be a thing when it has already worked perfectly with the router settings exactly as they are...?

Please help..!