Dug into this a bit more today - we do have contacts open, but this is complicated.
There appears to be a high level internet routing issue - and it may be spreading.
That would be why in these cases, a VPN seems to work for most, it gets around that routing path.
Several symptoms, can’t reach our domain, store, ticket system, games…etc., and it also appears to be periodic for some.
The best way to tell if this might be impacting you is to run a trace…or try a VPN, see if that helps.