Ask HN: Is HN Blocking Mullvad VPN?

I've noticed over the last ~week that if I try to navigate to HN without active logged in session that I am often blocked from resolving the site, instead seeing a "sorry" page.

Seems to be more a desktop issue than when I've tried to reproduce on my phone with the same VPN.

Is this a blanket VPN thing or something specific about Mullvad connection points?