Intermittent connection issues loading/changing site- secure connection failed/site can't be reached

[EDIflyer]

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 using a NR5103E with Firmware Version V1.00(ACBJ.0)b14 - I tried rebooting it but to no effect.

[AlSeek]

Coming up to the end of my 2 year contract so just put in my 30 days notice to cancel. Somehow I managed to resist Three's offer to lock in for a further 24 months...

I intend to buy my own router (returning the Three one as is required) and try other 5G options since cable options for me are poor.

[Nameless]

An earlier check in because I decided to do a quick test

DuckDuckGo caused the issue this time then https://docs.pi-hole.net/

The first error took about 2 minutes - The second took 5 seconds after that...

How have things been for you all?

[bytespider]

For the sites I frequent, including Github, things have been fine. But I also use Chrome so I may not notice a slightly longer delay as the page loads.

[Nameless]

A check-in with no changes

Using my list of problem sites and starting backwards, Pavlovia and Background Noises • Ambient Sounds • Relaxing Music | myNoise ® both gave the error the first time I loaded both websites

How long did it take to encounter the issue? Less than 10 seconds

Needless to say, this is still a problem

I remember that there was supposed to be regular check-ins with updates from Three - It seems that there must be another issue there...

[torz77]

Still the same crap. Is anyone actually bothering to try to fix this, or are three just hoping it will go away by doing absolutely nothing?

Hint: that isn't working, guys. Well over a year now. Madness.

[EDIflyer]

OP of the thread here! - still experiencing the same issues but FTTP now an option where I live so I'm leaving to move to that instead. Although the VPN workaround does the trick for my PC I find it a pain having to activate it on other devices and just want a nice stable connection that works!

[cerihughes]

Likewise. The FTTP installers are here as we speak. I'll be glad to get away from this unholy mess. The last straw came when I tried to install a Blink doorbell and it would barely work due to the number of errors connecting to their servers.

[Nameless]

An extra for this week:

Disabling band N78 to enforce the 4G mode does not eliminate the issues - It just becomes rarer to encounter

I will continue testing things as usual

[Nameless]

A check-in after a fairly busy week

I have not seen any changes - In fact before sending this message, I started going through the list of problem sites in reverse order and hit the issue with the second site (That would be Overview of Pi-hole - Pi-hole documentation)

Maybe things are worse now? I still use Cloudflare's WARP therefore I would imagine that VPN and WARP (Or equivalent) users have been shielded from this