Yep, I have the same problem! Please fix this! It should only be a few lines of code; something like this:
// https://developer.mozilla.org/en-US/docs/Web/API/Document/readyState
if(document.readyState !== 'complete') {
// DOMContentLoaded has not fired yet, wait for it
document.addEventListener('DOMContentLoaded', initFeed);
} else {
// DOMContentLoaded has already fired, init plugin directly
initFeed();
}