I will use the Signal app as an example.
In the app's notifications settings I have it set so text messages results in a Signal icon in the status bar, the phone vibrates, and the Signal icon on the "desktop" has a dot; but no sound is made. This is how I want it.
For Signal phone calls, same notification settings except I also allow the sound to occur.
I set up a mode that I want to use ad hoc when in quiet situations: church, concert, speech, etc. What I want is for the Signal text messages to continue the same way during the do not disturb timeframe (since they aren't making a sound anyway), but for the Signal phone calls to stop making a sound but allowing all the other notifications (status bar, vibration, icon dot) to still happen. AND - I don't want these mode exception settings to mess up how Signal's notifications work once the do not disturb mode's timeframe ends.
Problem: I am completely bewildered by the options for the Signal app once I add the Signal app as an "App that can interrupt" for the do not disturb mode. As I wrote above, I want Signal phone calls to continue to leave a notification in the status bar and to cause a vibration and to attach a dot to the Signal icon, but I want no sound when the Signal phone call is received. So for Signal on the "Notifications that can interrupt" screen, I enable "Calls" so I can continue to receive those non-sound notifications, but it shows that the Signal phone calls will still also make the sound I had selected in the app's notifications settings. So, I have to manually change that to no sound? But if I do that, when the do not disturb mode timeframe ends, then Signal phone calls remain silent.
I hope my quandry is making sense. I suspect I'm not understanding or am not aware of some hidden assumptions about these options.