There’s a long discussion on this topic here:
https://forum.inaturalist.org/t/change-wording-used-by-the-system-when-downgrading-an-observation-to-an-higher-level-taxa/3862
To my understanding despite it saying “Planned changes to distinguishing the two ways to disagree” in the June 2019 blog post, nothing has actually changed, so there is no bug here.