Stubailo then competed at the 2019 World Championships in Baku alongside Evgeniia Levanova, Maksimova, Shishmakova, and Tolkacheva. They won the gold medal in the group all-around and qualified for both of the group apparatus finals. They won the bronze medal in 5 Balls behind the Japanese and Bulgarian groups, and the won the gold medal in the 3 Hoops and 4 Clubs.