Possessives 2 doesn't go to full strength on Mobile
When I strengthen Possessives 2 from French, it just stays at the 4/5. I have done this exercise multiple times but no changes. Also when I try to strengthen a skill from 3 to 5 on the website, it will only strengthen to 4.
This is one of the reasons I gave up the iOS app version to switch to website version. But I am not sure if it is exclusively because of using mobile or not.
My solution is to redo the individual lessons in that skill one by one instead of using the single button "strengthen" for that skill. It sounds painful for skills that have like 9 or 11 lessons, but luckily most of my skills would fill up to full gold after 2 or 3 tries. And I often pick the lessons that I seem to be least familiar with.
Hope that you can find a work around since this is such an annoying bug.
Bonne chance! :)