While I was able to correctly guess that michul dejun means breakfast, mostly by noticing that the word "Breakfast" was capitalised, Duolingo never told me before what micul dejun is, and in this question the word(s) had no tooltip. This is the first time I saw something like that here, I think. Am i missing something?
Not really. There are several words like that (although I remember learning micul dejun; maybe I'm wrong?)
There are two explanations: creating this course has been a massive undertaking for a group of volunteers (which is true regardless); or the designers intentionally are doing that, in order to simulate critical thinking. It's frustrating, but probably helps with learning.
At any rate, the course is still in beta, I think.