VR issues - very low framerate

Hello,
I have recently tried using Twinmotion 2025 with vr. The performance in Vr is terrible, most scenes being in the range of 0-15 fps, after trying an empty template i have noticed that the frame rate fluctuates between 15 and 70 and is never stable. Is there something i could adjust to improve the performance of 3d views?
Thank you