Just logged into Facebook app and looks like its updated and reset me back to level 1?

Reset your cache and it worked for me Mac Safari 10.1

If you click on the icon with the candy cane archway, it will show the the episodes you unlocked and played also which ones you haven't unlocked yet.  Click on the last unlocked one on the top and it will bring you to the episode you are on.  You may have to slide the map to find the exact level number.  You will see your picture icon where you left off.  Hope this helps.