Sí, puede ser que haya leído mal (suelo ir rápido) y hablan de la beta, pero creo que no:
https://discussions.apple.com/thread/250416731?page=4
En concreto se dice esto de un SE:
"Yes! iPhone SE. Yesterday I picked up my phone which had been sitting on my desk all day unused and it was down to 12%. When I checked battery usage 65% of that was from Messages. This morning my phone had gone overnight from fully charged to 11% and 45% of usage was battery. I’m glad I found your question! Rebooting the phone by holding the power and the home button for several seconds will help for a while".