Unfortunately, that is very common, and not just with apples.
Since I have gained control over my AS with the NSD I don't test with iodine anymore. I don't really care if the apples are totally ripe or not, because I now can figure out exactly what is bad for me. Maybe with time you can start not worring to much about that. But it will depend on your starch tolerance, that you will need to learn first.
Good luck
Zélia
