Render HEVC from premiere pro is mutch more faster then Export to render Que - via Encoder

I have a question. Why is the HEVC render much faster in Premiere Pro when I click the Export button directly in Premiere Pro than when I queue the render to the Encoder by clicking "Send to Media Encoder" for rendering. In the Encoder, the HEVC renderer is too slow with the same settings as in Premiere Pro. Is there a bug in the Encoder settings or is it an Encoder bug? Thanks for the answer.