Hiya, thanks for reporting this issue! Steam Cloud issues can happen for a number of reasons, unfortunately it's not an issue on our side or with the game, rather something will have gone wrong in the sync process when Steam uploads your save files.
Most of the time the issue will fix itself, as it might be an internet connection dip or the Cloud itself is down, if it hasn't fixed itself please check out Steam's FAQ on Cloud issues which has some troubleshooting tips: https://help.steampowered.com/en/faqs/view/68D2-35AB-09A9-7678