I don’t know whether this is a bug, or an unannounced design change in the official courses.
In the official courses, words are showing as fully planted after I see them 3 times in a planting sequence. I don’t mean that the planting session has been split into two half-cycles, as it has been for a while. I mean that the first half-session leaves the items marked as learned.
Actually it has become annoyingly unpredictable when words count as planted. I just planted five new words, never practised these before. Only one word went throught the whole 6-part planting sequence.