That damn 'Fall Patch', I really wish there were some better documentation.
Yes, you are of course correct. It is an addition to 'Bushido' or TRAIT_FIGHT_WELL_DAMAGED.
It gives +1
to fishing boats and +2
to atolls.
According to our code and looking in the database, everything 'should' be working as planned. There is the yield applied for that TRAIT on those areas.
I will run some tests now and investigate further.
EDIT 1:
Ok, I may have missed some change somewhere but as of the latest version, my fishing boats cannot improve an Atoll/Isles. I can't remember correctly, did we once have that ability?
Just how is the missing
, as mentioned in the OP, shown?
My tooltips show the atoll/isle giving the correct yield, and this would apply if it is inside my city limits. Also my fishing boats give the extra
. But I just don't know how you saw a negative yield.
One thing I have done though is remove the modded text from the Bushido trait. It should now correctly tell us all what the trait now does.