Can not encode the vp9 10bits streams correctly

videotestsrc pattern=ball num-buffers=300 ! capsfilter caps=video/x-raw,format=P010_10LE,width=800,height=600 ! vaapivp9enc tune=low-power ! matroskamux ! filesink location=vp9.mkv

Failed on icelake and using iHD driver.