Egel has learned 12 rituals so far: General sacrifice, bear skull rite, building a fire to attract forest maids, making foxes to come at the bait, fisherman's springtime sacrifice, net favorableness, meeting the water folk, blood stanching incantation, meeting the spirit of the forest, persuading the forest with a bread, releasing animal from the forest cover. He got the spirit world game course task and spent a while wandering around looking for a lost woodsman, then I put the game away.
When I reloaded the game, the task automatically completed.
I would expect the task to either automatically complete as soon as I get, if i have learned all the rituals already, or to not autocomplete if there are still some to learn, but for it to not be tied to loading the game in either case. I have a save game available if needed.