I also finished WK, reset back to level 51 and it seems to be working and even updated for my reset but I will say that the quality of the sync feels like “fire and forget” type of feature.
For example, 人 is not marked as done for me. One could argue that the usage is ever so slightly different, but there probably should be another pass at the vocab or an option to have the marker be a bit more aggressive in what you learned from WK.
My strategy, as I’m just using the vocab decks for sentences with mixed results, is just to go ahead and add the ones that seemed to not pass and muscle through the SRS.