[iPhone 12 Pro] silent mode not working properly
I mostly have my iPhone 12 Pro in silent mode (ring/silent switch showing red). However, after some time, the phone starts giving me sound alerts. To make it to silent mode again, I have to turn the switch to ring mode and then to silent mode again. Does this have to do with Do Not Disturb setup or is my phone defective?
iPhone 12 Pro, iOS 14