Most of the time when I swipe it down to turn the volume off, it automatically bumps it back up to that little bit. I don’t know why it does this and I don’t know why this bothers me as much as it does. 😅
Must maybe only be a thing on iPhone 15? I installed iOS 17 a couple days ago on my 13 mini and I can mute my phone no matter how fast or slow I go.