User blog comment:Pvgreenzebra/Not Really Random Page Button/@comment-1613840-20110720011456/@comment-2200849-20110721133824

This random wiki button appears to be moving in a preset series, which is updated from time to time, i.e., you will get to scratchpad from Central, from scratchpad to whatever and so on. The "bug" you are mentioning has occurred to me, too, but the sequence will change.