The issue some of you may be facing with posting and losing Riffs is to do with using the YouTube short URL format, for example, https://youtu.be/RKqzGOsY5MQ, and this silently fails which is a bug, for the time being, you will need to enter the YouTube URL in the following format https://www.youtube.com/watch?v=RKqzGOsY5MQ for Riffs to work.
Don’t worry they are not lost; there is a bug that’s currently preventing some Riffs from displaying on your profile, they are still in the database, we are working to resolve this ASAP.
Team Syn