Looking down while in jumping causes Arch Vis Character to get stuck in jump animation

Looking straight down at the floor causes arch vis character to get stuck in jumping animation. Did not experience this behavior with default character class.

1. Open Attached Project
2. Change the camera to use Pawn Control Rotation.
3. PIE
4. Walk up the stairs to the platform
5. While walking off the platform, change camera angle to look straight down

Result:
Character enters jump animation as he walks off the platform and remains in the animation after touching the ground and for the remainder of the play session

Expected:
Character is in jump animation only while in the air.