When plying through the newest demo, I ran into a bug while going through the catching tutorial. The text box said "Sandshrew was caught" yet as shown, he isn't. This bug is really rng as, after encountering it for the first time, I tried to recreate it it and it took quite a few tries. My steps were to make sure to use water gun and then throw the pokeball. Sometimes it would work, sometimes it wouldn't such as on my first playthrough this battle went smoothly.
-Hilbertism is a lifestyle