I was sailing with my Indiaman with an almost full cargo but was fishing too, after converting the fish into fish meat the fish dissappered but the fish meat wasn't visible even though my cargo is full now. After entering a harbor and unloading my cargo I noticed it says 41,5/8000 I guess thats the fish meat still inside but just not visible. Restarting the game, loading and unloading cargo aswell leaving reentering port didn't fix the problem.