I'm not the OP, but I've had trouble with the JPEGOptim feature of ImageOptim. It created JPEG files that crashed the JPEG decoder on some older android phones.
The files worked fine elsewhere, so I think it was an decoder bug not an invalid file, but I had to avoid optimizing JPEG files to avoid the problem.
This was about two years ago, so I don't recall version numbers or phone models.
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I'm not the OP, but I've had trouble with the JPEGOptim feature of ImageOptim. It created JPEG files that crashed the JPEG decoder on some older android phones.
The files worked fine elsewhere, so I think it was an decoder bug not an invalid file, but I had to avoid optimizing JPEG files to avoid the problem.
This was about two years ago, so I don't recall version numbers or phone models.