Returning to game of pods after a while, I have lost all challenges I had already done

Hi,
I completed some of the Game of Pods challenges and then I wasn’t able to go back for several weeks. Today I went to do some more, and none of the challenges appear to have been completed, so I have to start from zero.
Is this expected behavior? Thanks
Kind regards
Benedetto

If you have cleared your cache / cookies since, then yes.