This issue just popped up today when i moved the world from 1.8.9 to 1.10.2
I cannot send pokemon out in single player, And pokeballs aren't showing when thrown.
If i go to send a pokemon out it'll say 'Sent out Braviary' but nothing shows, And if you press R again same thing.
Tossing a Poke Ball you see nothing, but apparently it is still there, as evidenced by how i can catch things still.
I had the logs, But apparently i cannot locate them. I'll edit this post with it once i find it.