Works fine for me. I suspect that sticking with the Type II may be your problem as KL seems over ranked for the canoe operationally in the long term as opposed to a training assignment.
I was promoted KL from OLzS after my second Type VII patrol where I sank two ships for 15,000+ GRT plus a Black Swan frigate and Flower corvette. The warship kills were in desperation after receiving significant damage and running the battery down to <25%. Got a Knight's Cross for the pair and presumably you get Oak Leaves for bagging a third...
-C
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