Instagram is disabling the ability to share (and reshare) posts from your feed to stories as part of a test to see how it changes engagement with the popular feature.

Is Instagram removing post sharing?

Instagram says the changes will promote more original content. In a move that surprised many, Instagram CEO Adam Mosseri announced that Instagram would be moving away from photo content, focusing instead on video, shopping, and other "entertainment." "We're no longer a photo-sharing app," Adam said.

Why can't I repost on Instagram anymore?

Go to either the Play Store or App Store, find your reposting app, and look for new updates. ... Your chosen reposting app might get an update that will cause problems if your OS and your version of Instagram are out-of-date. If that's the case, simply update Instagram and update your smartphone's OS.