I have the exact same problem as the person asking this question:
https://answers.splunk.com/answers/400053/condition-match-and-set-token-in-drilldown-not-wor-1.html
The answer is outdated. Can someone please Update The Original Question? It simply says that this solution does not work in 7.0.2.Everyone who hase a similar problem in the question gets a link to this question. it quite central to the topic.