A fix has been deployed for the Completed section of the Quest Log as it relates to "Saving Lvell", "Herbs for Clarence" and "HH Lodge: Supply IV".
Earlier today, I mistakenly thought the issue stemmed from the engine updating 2 days ago. After several hours of pursuing that vector, the real issue became clear - it was like this all along. Herbs for Clarence references a description entry that was never added, and the other two references a reward that was never meant to be.
Upon loading into the game, a debug will run for Saving Lvell and HH Lodge: Supply IV. Herbs for Clarence had a separate description added to satisfy the missing requirement.
If you come across a Quest Log related crash at any point during play, please report what stage of the quest you were on, what the most recent thing in the quest you did was, and which menu (Available, Completed, etc) the crash happened on. I can more than likely fix them as they're discovered.
Additionally, I followed this up shortly after with 8.4.1.7 which removes "A Daring Raid" from your quest log if you obtained it before today, plus changed the ending of the Snowdrift Village quest dialogue to not hint at the now canceled YSM DLC. We've talked about this a bit before, but it simply comes down to interest and investment. With the base game being free and interest in paying for DLCs being just as low as it's ever been, it doesn't make any sense for me to drop 200 hours developing something only 3 people will buy. We are very far removed from this just being a passion project I put out to fluff my game design portfolio. We are very near to the end now.