I've tried searching through the issues but did not find one relating to this. Please close if this was already addressed:
Sending a notification through dbus.notify with a hint transient=1 should create the notification but not queue them up in notifications queue to be dismissed. Tested this in Gnome3 and works as expected. Example using notify-send command:
notify-send -h int:transient:1 "Summary" "Body"
Honestly I never knew that's what transient was for... I'll see about changing this.
+1 to this.
Same issue here, documentation about notifications is here:
and this bug may be related:
Fixes Cinnamon Notifer not respecting transient hint