We hope that the difference in GraphicsRHI will not cause such a big difference, but we need to make sure that there are no measurement omissions in the case of DX12.
Then "Meshes" value is 7.84MB. But If settings DefaultRHI=DirectX11, it shows the 108.98MB.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-151368 in the post.