We've detected a bug when on our Android beta version 3.6 (184).
When you first try to add a new snippet after the beta updates, the local media takes a while to load all your photos and videos. It will eventually load after a while.
We've gotten a few reports about this issue and our development team is already looking into it.
In the meantime, you can uninstall the beta version and download the official version of the app instead - https://play.google.com/store/apps/details?id=co.onese.android&hl=en&gl=US
Thanks for your patience and sorry again for the inconvenience! 🙏