I am having an issue with my ceiling in a kitchen remodel. The kitchen is located in an addition on the back of a standard ranch. The homeowner wants to have the ceiling follow the roof 3:12 and when I try to add crown on the left side, My high side, it has a strange cut that won't let me add crown. It is happening on both walls but the opposite wall is blank. I imported this drawing from V13, but I don't think that is my problem. Any help would be greatly appreciated!
I am new to V2018 but have been a longtime user.