This recent patch update aimed to solve two issues,

1: Sprites appearing invisible

2: Restarting the game in battle mode not restarting with correct # of AI.

Good news, bug #2 was fixed! 

Bad news, bug #1 should work, as it does in the game engine. However, the issue is assumed to be itch specific now. The game should not start until everything is loaded in correctly first. The fact that they are still invisible leads me to believe that it may not be able to fix. My apologies for the invisible sprite bug! I hope that you all are still able to enjoy the game none the less!