User blog comment:Kirkburn/Technical Update: June 8, 2016/@comment-5558012-20160608193751/@comment-11733175-20160609095815

I would hazard a guess that it's because the Community Corner module, as with all modules in the sidebar, are lazy loaded. The script that loads the twitter feed, while marginally delayed after the overall pageload, is loading before the sidebar and thus doesn't detect the usage.

To fix it, I'd do 2 things:
 * Add an event to the loading of the sidebar, that can be hooked from to define when you can safely interact with it.
 * Modify the script to utilise that event and run on children on the sidebar when it finishes loading. The problem with modifying the script is that it's a standard snippet from Twitter and modifying it too much could cause side-effects down the road. However, as it's unlikely to be updated unless breaking changes are introduced, it's probably not going to be an issue.