I use UE-5.3.2, the MetaXR Plugin, Meta Quest Pro and MetaHumans for a VR project. My PC setup includes 32gb RAM and a Nvidia 3080ti.
Typically, when I use the VR Preview, I consistently get 72fps which is the Hz the Quest Pro uses. However, when I work on the project, e.g. move actors around the scene or change some scripts, for a few minutes (5-15min), I only get 35fps/36fps and it seems to be locked on this fps value. After restarting Unreal, I have 72fps again.
What could be the problem?