How are some websites able to bypass Pi Hole?

[jfb]

I loaded that website using Google Chrome (latest) and Pi-Hole, and did not see the ads. I would use the tools in this thread to help you determine where the ads are coming from:

How do I determine what domain an ad is coming from?

Block ads or fix broken sites This FAQ is written in the context of finding out how to block an ad that isn't blocked automatically, but the same steps can be used to troubleshoot issues with sites that don't function properly. An example is that sometimes certain payment gateways try to collect metrics on the sale, but these domains are blocked by Pi-hole, so the payment cannot be processed. Also, some links send you through several referrers and if one of them is blocked, you may land on a …

DNSThingy shows the following domains requested at that site:

irctc.co.in
www.irctc.co.in
assistant.corover.mobi
www.googletagmanager.com
fonts.gstatic.com
s3.ap-south-1.amazonaws.com
ajax.googleapis.com
maxcdn.bootstrapcdn.com
cdnjs.cloudflare.com
www.googletagservices.com
cdn.jsdelivr.net