Is anyone else occasionally getting a 'connection down' error from Chrome (or 'Secure Connection Failed' from Firefox) when changing page - if I hit refresh it works fine. At first I wondered if it was the site I was using but have noticed it on multiple different major websites over the past couple of months and not noticed it from other locations where I don't use Three Broadband so does seem to be related to the router/connection (this is via wired Ethernet too, so not a WiFi problem). I've tried changing DNS server in case that helps but no difference.
It mainly seems to happen when trying to first load a site or (annoyingly) at checkout when a different site is being loaded as part of the checkout process. It certainly doesn't happen everytime but does happen with reasonable frequency. I've also noticed I often get it when trying to pull/push from/to Github too and have to do so a number of times for it to work (browsing the Github website works fine).
I'm in the same situation (NR5103E, firmware V1.00(ACBJ.0)b14).
I've also seen the same intermittent errors for a few months. Initially I thought it was the browser (I was using Firefox; as someone mentioned, Chrome does some retrying and the problem is less obvious). Then I realised it happened on the command line and in other apps as well.
I believe it's the same issue mentioned here:
In that thread, the OP mentions that switching to 4G fixes the issue. I can report it works for me as well, though of course it cannot be a long-term solution.
While on 5G, the "Cellular Info" section in my router's UI reports NR5G-NSA as Access Technology, and a RSSI of -89.
I'm using the following one-liner to test; it uses Curl to connect to github.com 10 times, ignoring the output but printing any errors. I'm attaching a screenshot of its sample output.
for i in {1..10}; do curl -I --no-progress-meter -o /dev/null https://github.com || true; done;
