Video links becoming attachments rather than embeds

Since 3 weeks ago, whenever I paste a Vimeo link into Viva Engage it becomes an attachment that, when posted, requires the post to be expanded before it can be watched.

Previously it's always scraped the vid and embedded to the post, so both the player and copy are immediately viewable by the community.

None of my Vimeo settings have changed so I'm unsure why this has occurred.