if you use any kind of 3rd party analytics service you need to communicate with outside api basically every (analytically relevant) action of your user... so it's pretty standard on web and native apps alike
Other repo do not have "suspicious" strings in their url, so they pass through ublock, while the real google analytics call is blocked and github does not fail. You can check the network tab in the developer tools in chrome around github and see that calls to GA gets blocked and calls to github pass while on that specific page also the call to github fails