It's still happening. Everything is ready but Waasma's event still happens every 20 minutes, and Pepperseed is nowhere to be found despite being "ready" according to Supply Foreman Alan. What bothers me mostly is that according to another post, there have been known issues with the Pepperseed event chain since... like January? Doesn't give me a ton of hope to see this fixed to get the achievement, unless it's some unrelated bug in the same event chain.