I seem to be caught in config hell.
I pretty much always have my phone on silent. I usually have it on DND from 11pm to 7am.
When I am in DND Mode, I don't get the dialler come to front of attention, and if I turn off DND, despite having my volume at 0, I still get a bunch of sounds including from apps notifying me, and keypress on the keyboard etc.
I've obviously messed something up. Any ideas?