Hi, I'm using Sony Reader PRS650 and I've been experiencing a very strange bug with highlights some recipes (both the user-created ones, and the ones that are part of text formatting).
When viewed on the devices itself, highlights aren't displayed property: only certain words become highlighted. (technically, the whole area is highlighted and if you try to copy the highlight, whole selection is copied) Here is the screenshot:

However, when the same files are viewed in Sony Reader Library, the same highlights are displayed properly.
Also, this problem isn't universal, only few recipes created by calibre have it. I have not the faintest idea what may be causing it, so would appreciate even some ideas where the problem may be.