Since “Pico Streaming Assistant” was replaced by “Pico Connect for Steam VR”. Full screen and headset tracking options do not work. Streaming Assistant client for Steam VR on headset is no longer available.
How to restore VorpX on new Pico Connect software?
I have no issues with head tracking using pico connect & vorpx, however I use virtual desktop 99% of the time with my Pico 4 and only use Pico´s own software when virtual desktop fails in some particular cases.
I don´t know what that 5.9.2+ version you are referring is?