Thank you for your feedback. Last night, I was playing and didn't notice those errors in the save system. However, I want to ask: did you close the game while in combat? Could you try obtaining the characters in the gacha again and then close the game from the menu (using the close button or Alt+F4)?
I'll explain the error: currently, with the new save system, progress is automatically saved when exiting the game from the main menu. However, if the game is closed during a battle, it doesn't save, which makes sense as there's no need to save during a battle, except for the rewards. BUT, the issue is that, upon reading your comment, I realized I didn't make the game save just before entering a battle. I should call Save() before changing scenes as well to avoid errors.
I'll review that Goblin and fix it.
Regarding the UI error, I'll check it to see if I can replicate the same issue. I'll likely release another fix, by the 29th or at the latest on the 30th.