That is strange. I just looked at our professional Shutters pictures from the Dream in September - we are not wearing masks in any. Outdoors, they obviously weren't required. In the dining room, we already had them off and kept them off. And inside, they had a table to sanitize, remove your mask, and set it on the table. The photographers were then wiping tables between parties. We have lots of indoor, maskless Shutters photos.
Our indoor "diy" photos, such as character pics, all include masks, of course.