So this is the third time in the last two weeks that I've lost my striped wetsuit (which is fairly rare) after disconnecting from the international island. The first two times, I had my wetsuit in my pocket, and lost it along with everything else I had caught and hadn't put in the basket yet. The third time, I had just put my wetsuit on before disconnecting, and I still lost it...
So either put your rare wetsuit on before you go to the island and keep it on the whole time, or don't take it at all :T
So either put your rare wetsuit on before you go to the island and keep it on the whole time, or don't take it at all :T