Bought the game a couple of days ago and here are the most recurrent bugs I came across.
1. One of the reason for that is that the loading button rarely works on my side : either it doesn't do anything or if it reloads, the save is bugged, like erasing all of my idols.
2. Going back to the menu hardly works to reload, most of the time, it starts a new game when you want to load your save or when you click on "continue".
3. Twice, when I clicked on the audition button, the game froze, loading the white-grey background, but never loading the five cards. No other way around than quitting the game.
4. And today, I came across a new recurrent bug, the game sometimes shows on screen that a task is done, but on the "project"'s tab considers that it is still ongoing. Letting time flow doesn't really fix it and so far cancelling the "project" was the only way to go around it.
5. Not really a bug per se, but I shall add it here still, the game starts lagging on my side when you start having over 50 idols or so.
6. There's something I'm unsure whether it's a limitation of the "unfair" setting or a bug, but I can't add "talk breaks" during concerts. It's not something I encountered in the two other difficulty settings.