Can't connect to feedbin.com ?

I'm sorry to post such a vague topic, but I can't connect to feedbin.com - sometimes!

I've tried adding it to the allowlist, no joy.

I've tried sifting through the logs, there are no obvious entries being blocked. In fact, feedbin seems to resolve ok.

`dig feedbin.com` works fine

_and yet_ it simply will not connect in the browser. Mobile, desktop, firefox, chrome, whatever - I just cannot get it to connect sometimes.

Then other times it connects just fine.

Changing DNS works. Going in via VPN also works. Changing to LTE works. Therefore I have to question NextDNS as the culprit, although I cannot 100% write off my router (mikrotik) or my ISP.

Can anyone else on NextDNS reproduce this issue?