strengthening algorithm broken in courses from Russian
I don't know if it just an a/b test I have the misfortune to be part of, but is now impossible to regild these trees. Using the strengthening button in individual skills only gives access to a limited number of the skills's words and repeats them over and over again. Even redoing lessons has been removed as a good option as the lessons now take more questions than before even when no mistakes are made and also repeat questions. I have not used duolingo for a week and lost my streak due to frustration over this. The first time through a lesson seems to be fine, but keeping the tree gilded is a very good way to put words into long-term memory and was one of duolingos strengths. Please please fix this. I thought for a while it was the kindle app that was broken as I like to use the app to regild but it is the website too, I tried to regild there as the app wouldn't work.
It is the Spanish and German courses from Russian I have been trying to regild most recently. I have just tried to regild two other trees, one from German and one from English. They do not seem to have the same problem with word choice. So at least I can work on something else:) I don't actually care about the streak but I do want to keep learning Russian but need to regild rather than just plough on without reviewing.
I have similar, though not quite the same problems with german tree, so I switched to spanish for a time being. I also hope they will fix it. You are absolutely right when you say that the strengthening process is the main duolingo feature and they keep messing with it. But as I said, my problems are not the same, so I can't give you any advise, sorry.
I just successfully re-gilded a skill in my RU->FR tree. It took one go-through. I didn't do a whole second one, but I started one just to check, and different words came up.
Don't answer your question I suppose, but maybe if somebody comes along who can point to an opposite experience in that tree, one could perhaps narrow down the hypothesized set or origins.