Assault Battles: Forest Moon is now impossible, even on the first tier

Previously in past events I got 3 stars on the first tier, 2 stars on the 2nd and couldn't finish the final battle on the last tier. But now I can't get past the first tier of stage 4. It's like they don't care and couldn't be bothered testing the game. That or they think everyone in the game has the best possible mods with every single character unlocked, max stars and max gear.