Happy to give this one a shot with all the info you provided 
. Feel free to test the Flatpak here https://github.com/flathub/flathub/pull/3324 @davidrevoy
Keep in mind this is using the latest tagged release (0.2.0) - There have been updates to BeeRef since, but they’re not tagged in a release. If you want those changes, message the app dev again and ask them to create a new release
There’s also a crashing bug someone made a PR for here that upstream should probably merge: https://github.com/rbreu/beeref/pull/59