android app icon missing on certain device

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http://stackoverflow.com – I've recently developed an Android app. For some reason the app icon does not show on the home screen on a HTC One device. The icon shows fine for my other devices. Reading other forums, I have made sure the app is stored within the phone rather than the SD card, and tried rebooting but these do not seem to fix the issue. I'm guessing that the HTC One is not picking up the icon file, but I'm not sure why - as the other devices including Galaxsy S3 and other HTC devices do? Any help would be appreciated. Thanks in advance! (HowTos)