Comment by p_l

I can definitely confirm our initial reaction was "WTF" followed with idea that the dev team is making fun of us... but we went in and run traceroutes and there it was :O

Was fixed in incredible coincidence manner, too - the CTO of the network link provider was in their offices (in the same building as me) and felt bored. Apparently having went through all the levels from hauling cables in datacenter up to CTO level, after short look at traceroutes he just picked a phone, called NOC, and ordered a line card replacement on the router :D