Thanks for the feedback. We're really interested in this bug, as we spent a long time trying to get the highlighting and scrolling right, and it sounds like we haven't quite solved it after all.
It would be really useful if you could give examples of specific searches that aren't being highlighted, along with the relevant parts of the schema you're searching against. If you'd prefer not to send them in a public forum, feel free to DM me, and I'll pass your examples to the team.
Red Gate Software.