[2021] How do I re-track Construction in Activity Tracker? It randomly stopped being tracked and clicking on it doesn't put it back, it's stuck on 7/8?

To add something to the activity tracker, you'll need to go to the tab for that type of content, and track/pin/select the content you want.

In this case, Achievement Paths are on the first page of the Achievements tab, which is on the Hero parent rather than Adventures.