What a mess.
Duolingo Home (Web) UI changed again this morning/noon so I tried to test out my last PT checkpoint
(owl was taken away on the old tree design).
The tree checkpoints can still be accessed on my older Android app version but they only allow tapping of word banks, no full (free) typing.
After only some restricted hours (3-4 retests of the last PT CP) of runtime the Web UI switched back to the new path layout later in the afternoon after the Firefox Nightly on mobile somehow refreshed the duolingo com website.
Now I'm trying it again for the German CEFR course with the other www-internal website for CPs #3 and upwards: https://www-internal.duolingo.com/check ... /4/bigtest
The checkpoints at least still work there and won't simply redirect to the /learn home page.
The question is how long.