Everything will settle out given time. I've only done iodine tests when I've have stuck ferments and once once was starch the problem. Modern grains will mash in 20-25 minutes, so giving them an hour makes it really unlikely that any starch is left.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk