Thanks for reaching out. While collaborating, it's necessary for all the collaborators to have the latest version of XD, which is 18.104.22.168 so please ensure that all the collaborators are on the latest version, If the app is already up to date, could you please confirm what exactly is happening? Is it happening on a specific file or multiple files? Is it happening with a specific collaborator or multiple collaborators? We're here to help, just need more information.