When i open a raw file,camera raw 9.4 opens in photoshop completely greyed out,apart from the photograph,to access the controls i have to right click anywhere within camera raw and everything returns to normal.I have never had this with any other version.
I cannot replicate your problem. What operating system are you using? What version of Photoshop? You might try turning off GPU acceleration in your Camera Raw preferences to see if that makes a difference.