Statistics won't update

Sorry, I know there is an official thread, but I couldn’t find it in the moment (bit too early, perhaps!). I just wanted to let you know that I’m having problems with my statistics. When I manually update, all of the bars update except speaking and writing. This seems to happen across both languages (French and German). Is this a problem due to the updates or is there something I can do myself to fix it? Thanks for your help!