How to I troubleshoot a tracert that dies from one site, but not another?

Specifically, I'm trying to tracert avivaavantage.ca, which has two A records, 192.230.81.161 & 199.83.132.161.

From one site, I can ping / tracert both, but from my 2nd site in Canada, I can only reach one IP, while the other one dies on a cogentco hop.

Does this mean that cogentco has an issue? Is there anything I can do about it or report it to someone? Naturally, the broken A record is the one my most important site resolves to.

...or am I missing something and the issue is really on my side?