@joningold I have no clue how ecosia does suggestions, but I'd assume that most naive ways to implement suggestions would end up inferring from smaller-and-smaller datasets when the query becomes longer and/or less common. This might be an artifact of something of that sort?
That said, I do find it weird: "do not display suggestions" or "widen the dataset" are two things one can do when that happens, and privacy controls (assuming suggestions are based on users' self-corrections) provide information on when to use them.
@robryk yeah, i assume this is just a brief insight into what people search for a lot. The mushrooms are still surprising. (Part of me thinks I should search for "penis envy mushrooms" like it's the start of an ARG but I don't have time for an ARG especially one about penis mushrooms.)