When I do some puzzle using my computer and then later on I want to do some more on my mobile phone, I have to restart the ones I did previously on my PC. There is no updates.

(Android using lichess app)

This has been reported so many times it's not funny. I have to clear data, login, set my preferences and before doing puzzles probably 3 times a day. I have no confidence it will ever be fixed.

Sorry , I didn't know it was a recurrent subject.

But thank you for your answer!
Let's hope it's the last time someone complains about it :)

This bug has been reported here: github.com/veloce/lichobile/issues/831