When I change any app's notifications from "Allow sound and vibration" to "Silent" and leave "Lock screen" option on allowed, notifications do not show on the lock screen as if the "Lock screen" option does not do anything. Only if I leave notifications on "Allow sound and vibration", the "Lock screen" option actually changes whether new notifications show up on lock screen, which sounds like a but no. 1 to me.
No. 2 is that when I choose "Allow sound and vibration", go to "Notification categories", choose a category and turn "Vibrate" off, notifications still vibrate!
To sum up, those two (what I think are) bugs are stopping me from showing notifications on lock screen while keeping its vibrations off.
(tested all that on "Vibrate" system's sound mode, which is what I use)
