Even without that kind of false positive, with every phone running the check on every image false positives on perfectly normal images will be extremely common.

I occasionally use the Civitai.com to generate realistic images, and due to US regulators jawboning payment processors, they've put in strict filters. I've been using it for G-rated images, but they often get false positive for much worse ratings. I generated an image of a portrait of a couple at the beech, with a man in board shorts and a fully clothed woman, and it rated it XXX. One image of fully clothed people didn't even get a rating and was automatically removed as a "terms of service violation".