It's possible I might have typed lottery in my avandanium browser but that's connected to duckduck go search. I am on graphene os but I do use Gboard I think as mentioned. Hmmm.
Discussion
DuckDuckGo makes most of its money from keyword-based advertising. They pretend to care about your privacy but it's all privacy-washing bullshit. Never trust a service who makes money through ads.