Italic Version of Thumb Position is Missing

As you see, the second fingering has the Italic property set in each case. I can’t see any difference between the normal and italic thumb position marking, which is a real problem if you need to use these to distinguish the composer’s markings from an editor’s,

I’m afraid there is no italic thumb position symbol in Bravura, and no italic version of Bravura, so this isn’t possible at present.