UPDATE NOT WORKING
Duolingo has a HUGE BUG that is not being addressed. Here is the ongoing problem:
XP is not being registered so I am automatically losing my daily string unless I use my insurance. I have spent about 1600 gems trying to hold onto my 845 daily string even though I am still doing the required XP.
I have done the yellow tree all the way. Recently a couple of early icons turned color. No matter what I do I cannot get them yellow again. The tree is simply not functioning.
I have reported this before and was hopeful that the latest update would address this problem. I can only guess that the developers have gotten way ahead of themselves with all the new features and are thus losing the features that have made it so popular. I am a PLUS user because I want to support the program. PLEASE GET THIS FIXED ASAP.
I just lowered my daily XP to relaxed (10) to make is so I would not lose so much. After I did the 10, it registered that I had completed my daily XP. Then I closed Duo and reopened it. AND IT WAS GONE, GONE, GONE! Am I the only one who is having this problem? I am using an iPhone X on the latest operating system.