Lost Intellisense after reorganizing project

Hi! I just used premake5 beta1 to organize my recent project and even though the structure is as desired and no linking errors manifest out of nowhere, i suddenly lost intellisense and colors of certain variables to all included files. Moreover, when i try to add a new class item, i get a message like "{DirPath}/foo.h is not in project" and creates only the header file on the root project directory. What do I do wrong?
Here is the premake5.lua:

workspace "VolumeInspector"

    architecture "x64"

    configurations
    {
        "Debug",
        "Release"
    }

outputdir = "%{cfg.buildcfg}-%{cfg.system}-%{cfg.architecture}"

project "VolumeInspector"
    kind "ConsoleApp"
    language "C++"

    targetdir ("bin/" ..outputdir.. "/%{prj.name}")
    objdir ("bin-int/" ..outputdir.. "/%{prj.name}")

    files
    {
        "main.cpp",
        "src/Engine/Core/**.h",
        "src/Engine/Core/**.cpp"
    }

    includedirs
    {
        "External/spdlog/include"
    }

    filter "system:windows"
        cppdialect "c++17"
        staticruntime "on"
        systemversion "latest"

    filter "configurations:Debug"
        defines "DEBUG"
        symbols "on"

    filter "configurations:Release"
        defines "NDEBUG"
        optimize "on"

Start with the provided premake5.lua and reproduce the project generation using premake5 beta1. Inspect the generated project files and IDE behavior around the src/Engine/Core/**.h and **.cpp entries, then verify that included files provide IntelliSense and that new classes are created in the project directory.