So you have selected the mission? YES
You then went to the patrol area? YES
You then sank a ship inside the patrol area? YES many ships
Did not show the tonnage on the bar? YES
Did it register when you opened the Captains Hat Icon? YES there it is listed exactly
Did you see a Destroyed Mark on the map? YES
Did you remain close to the target when it sank? YES most times I have to dive and hide for Destroyers.
What mods are you using? The Wolves of Steel + my
Addon
Is OH2 messing with that function or is it a SH5 bug?