#I have a Sample Project For You &
Dear and ,
Here is a fully functional sample project of <50MB download which demonstrates issue!
#Once You Download
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in editor PIE you can go in game, and observe fps drops by a lot while nav mesh is rebuilding, as low as 30 on first build
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successive rebuilds at runtime averaged a loss of 30 fps for me on my computer, if your computer is super fast you may have to make nav mesh bigger.
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You can press P key to repeatedly spawn colliding Static Mesh Actors 512 units from player unit, which on my machine cause a loss of 30fps until nav mesh finishes rebuilding
Again if your computer is really fast you may need to make my sample nav mesh bigger!
Let me know how your tests with my sample project go!
#Download Link Again, < 50 MB
Copy will tell you folder is read only, dont worry, just find download button and it should download just fine 
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