Navmesh of SubLevel not work in Persistent Level

I create a TopDown Project,there is a defalut level “TopDownExampleMap”
I create a empty Level Named TestLevel2, and add TopDownExampleMap Level as SubLevel
In TestLevel2 Build Paths, generate RecastNavMesh and AbstractNavData
Then Run, Actor do not Walk,and editor will crash at end play
Please Fix this bug, Thank you


I have resolved the problem, in “RecastNavMesh”,click “Rebuid at Runtime”