Tumblr recently updated its iOS app to censor several tags, including "submission," which Tumblr automatically applies to posts published to a blog. The company explains that the changes were made to comply with Apple's stricter App Store "sensitive content" rules.
https://www.techspot.com/news/92793-tumblr-censoring-over-400-tags-ios-app-comply.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/92793-tumblr-censoring-over-400-tags-ios-app-comply.html?utm_source=dlvr.it&utm_medium=blogger