Hello @Lola_Pop Thanks for the explanation. No I never did get the event back. Kind of a bummer, but I know tech issues happen. Looking forward to the next one!
Hi @CuiYi04 once you finish the tenth level, you then need to collect 30 new stars in the regular level. But it sounds like it disappeared, just like it did to me. It returned the following day, so don't worry yet.