Unreal Engine 5.5 Dynamic Nav Mesh Not generating Instanced Static Meshes Spawned using Construction Script

Development Programming & Scripting
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In Unreal Engine 5.5 Dynamic Nav Mesh not generating on Instanced Static Meshes Spawned using Construction Script. Nav Mesh generates if I move the blueprint actor. But when I re-open the level nav mesh is gone again. Please check the video.

https://youtu.be/EiSrhGYavMM

Everything works perfectly fine in Unreal engine 5.4 or previous versions.

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Anyone having the same issue?