I started playing MCD recently again. So I was playing the new Minecraft Dungeons Seasonquests for the new event when I wasnt logged in. Then I logged in again to save my progress to my Microsoft account and to get the event rewards. When I opened the tab and checked my progress, the quest I have done before I was logged in didn't count to my progress. 
Now after I did 4 missions in total it still only counts as 3.
Username: FilehunterYT