Preheat the oven to 400 degrees F.
Use a large saucepan over medium heat to melt the butter. Add the flour and stir to combine, making a roux.
Gradually whisk in the heavy cream, white wine, and chicken stock until the sauce is smooth.
Add the salt, pepper, paprika, garlic powder, and onion powder to the sauce and stir to combine.
Add the chopped lobster meat, parsley, and chives to the sauce and stir until well combined.
Transfer the lobster mixture to a 9-inch pie dish.
Roll out the puff pastry sheet on a floured surface until it is slightly larger than the pie dish.
Place the puff pastry sheet over the top of the pie dish and trim off any excess pastry.
Over the top of the pastry brush the beaten egg.
Bake the lobster pie for 25-30 minutes, or until the pastry is golden brown and the filling is hot and bubbly.
Serve immediately.