You don’t have any description of what that “bug” is…
I have a Samsung Galaxy S5 (and a backup).
Just checking again, from it working at the start of January, the app is just showing a spinning and churning progress wheel in the middle.
So some update broke it. The app is basically a wrapper for the device’s browser, so maybe the client code has gone stinky. Or they are trying to break out of their jail with methods not supported.
Update (9.1MB). Same thing. Non-rooted OS. 6.0.1