The 26 July 2016 patch notes said: All ascended amulets now have a single enrichment slot.
The issue is that looking through the various enrichments (Gilded Enrichment, Magical Enrichment, Experienced Enrichment, Karmic Enrichment), their description is: Double-click to apply to an unused utility infusion slot.
This may lead to confusion for someone who hasn’t read the patch notes, or isn’t willing to experiment (both the amulets and enrichments cost time+currencies, after all).
For consistencies sake, I’m reporting this anomaly.