progress bars not updating

[francouzak]

Can anyone tell why the progress bars don't always increase at the end of the exercise?

[pentaan]

Please, read the comments of:

• Speir_ in https://www.duolingo.com/comment/23663317
• hughcparker in https://www.duolingo.com/comment/17826400/I-can-t-keep-my-levels-golden

I hardly have this issue, since I use this method daily:
https://www.duolingo.com/comment/6176795/Best-Way-to-Make-Your-Tree-Turn-Gold-and-Stay-Gold