Words disappeared

My friends and I created a course. Recently we noticed that many of the words we have saved are not available any more.There used to be more than 250 words but now there are only 135.We don’t know how to restore them.Does any body know what the solution is?

The same thing happened to me, well almost the same. I had over 760 ‘words learned’ from different courses and now all of a sudden 40 of them are gone from the total count, it’s reading 720 sth words learned for some reason, even though I manually checked from all the courses I’m doing and it should be (it was!) 760. Restarted the app and web service and still the same.

hello there;
did you contact memrise team?
I did but still no reply.