Archicad imported model rendering slow

Good morning
I have a problem with the new archicad converter. the rendering takes much longer and the performance of my RTX 3090 graphics card does not exceed 20%. Does anyone have the same problem? And how to fix it please?

Hi mate, does the slow rendering problem happen to this specific file only? If yes, please compress the scene file folder and send it to us, also you can send us the model file as well.
If you need to use the old version of AC plugin now, you can download that from here:
D5_Converter_ARCHICAD_usa_0.4.0.exe - Google Drive