If you have all legendaries on two chars, buy a Purified Titan Essence on one of them (e.g. a Druid), and get a legendary token for your other char with all legendaries (e.g. a DK), that token will always turn into itself when using it. It seems the "if you have all legendaries for that class, you will get a token for another one" fallback is only applied to drops and the Essence, but not the resulting tokens.
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Reproducible:
Yes, if you are "unlucky". Happened two time to a friend of mine, by now.
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