Could we consider displaying duplicate questions in a sidebar?
For example if one question is marked as duplicate it gets linked one way but not the other way around.
This can create chains of questions which are all duplicate questions which is confusing.
So click on this question it you notice there are 2 questions in a row that are marked as duplicates so technically they should all be duplicates of each other but that is not the case. They are not displayed in the sidebar.