Yellow markings of the notes are not displayed next to the verses in the iOS app

I have created notes on the Desktop Logos 8 Windows. These will be synchronized to the iOS App. So I can see all notes in the iOS app under Notes.
On the PC I see the yellow markings next to the verses. Unfortunately I don't see any yellow markings in the iOS app. What do I have to do so that these yellow markings of the notes are also displayed next to the verses in the iOS app?