First response digital

lilliaunasmommy • Two dd!♡ 👨‍👩‍👧‍👧 4 moon babies 👼🏻👼🏻👼🏻🥺❤️ Endometriosis & ovarian cyst suffer. 💪🏻

My sister took a first response digital and the clock never went away. Is this a faulty test or is this normal?