On May 10, Blockberry Creative announced HaSeul's temporary hiatus. 

The announcement posted on LOONA's official fan cafe reads as follows: 

"Hello, this is Blockberry Creative. We're here to make an announcement for the fans regarding HaSeul.

HaSeul will not be able to participate in LOONA's schedule for a while due to personal reasons. We apologize to the fans who've missed HaSeul, and ask for understandings on the abrupt news. We will inform you with more announcements if there is additional information.

Thank you."

Meanwhile, LOONA released the album 'XX' in February.