Interestingly enough, Journey was only doing a 20min wait from what I saw on the app. I'm not sure if the show is congesting the area so much that people can't get to the ride, or they are just there for the show and rode earlier, or what. It certainly doesnt have less people as 20mins is the lowest time they tend to post and leave it there even when it goes to a walk on, but you' think with all the people in the area focused on the castle they'd have more in the castle.
Only thing I can really think of is that unlike the morning crush, the ride is operating at full capacity. In the morning it comes online slowly - starting with vehicles as guests make it to the platform (the actual walk, lockers, grouping, etc.. hence the 20min minimum posted), then once it has any sort of standing line it's every 4th vehicle (so 1/4 of the intended daily operational number) and then it wont start bringing the other vehicles online until the line gets to the greenhouse. That certainly adds to the morning wait, but it's usually switched over within 30mins, less on busy days, worst case scenario an hour on a super slow day.