Why didn't The Bachelorette explain Garrett Yrigoyen's Instagram controversy?

The Washington Post

“Some stuff came out about my social media," Garrett said on last night's finale in explaining his Instagram controversy involving "likes" of hateful posts. As Emily Yahr points out, "despite an entire segment that followed about this topic, the show didn’t actually explain what Garrett meant with 'stuff' — which is a pretty crucial detail."