Some dialogue topics are not highlighted on first encounter
Sometimes, when taking quests, I noticed that new dialogue topics are not highlighted and are missing from the list in the right part of dialogue window. But, when I click previous topic again, new topic appears in list and is highlighted in dialogue text twice. Example is attached: at screenshot 1 I select the topic "duties" expecting to get new topic "disappearance of the Dwarves", but it doesn't show up. Then I click "duties" again, and at scrennshot 2 we see new topic highlighted both in latest and previous NPC's answers. Unfortunately, I don't have any easy steps to reproduce, this situation is pretty random.
(RM-4210 from redmine: created on 2017-11-13 by Denis Smirnov, , closed on 2017-11-15 by scrawl .)