Running JQM 1.4.5. Get same results on 1.4.4. This happens in IOS 8.1.1 and IOS 8.1.2.
This is not occurring on Windows PC or Mac OSX. Have not tried on Android.
When running app in IOS 8, the JQM standard icons in the buttons will start disappearing inside the outer circle. At first they all show, then as I run the app, they start disappearing.
Here is an image showing some missing, with others showing: