"Content Examples" project's navmesh crashes editor

In UE4.5, Opening a Content Examples project and opening the "NavMesh" level, selecting "SM_DemoCube" and moving it results in the editor crashing according to user.

Steps to Reproduce According to User:

Launch UE4.5.1

Open Content Examples Project

Open Navmesh level

Select SM_DemoCube

Move SM_DemoCube and play in Editor

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