On October 10, 2025, dozens of U.S. KISS and HOT radio stations simultaneously aired "Substitute Teacher is Sick" for unknown reasons.

A nationwide broadcast alert on October 10, 2025, revealed that multiple KISS and HOT radio stations across the U.S. temporarily replaced their regular programming with a recurring message stating "Substitute Teacher is Sick," without providing further details or explanation for the outage. The synchronized interruption affected stations in various markets, including 101.3 KISS FM, 97.9 KISS FM, 107.1 KISS FM, KISS 102.3, KISS 95.7, KISS 106.7, Z107, Hot 101.9, HOT 107.9, and STAR 102.9, among others, leading to confusion among listeners. The cause and duration of the broadcast issue remain unconfirmed.