I was shooting an airshow at the weekend in temperatures of around 28C, using the X-T2 with battery grip and the superb 100-400mm lens. Shooting in AFC ( function 3/4) zone and wide tracking focus points and I turn the camera off between shooting due to delay in one aircraft leaving and another arriving. 3 times, the camera would not switch on despite numerous attempts and I had to remove the grip each time and the camera turned on then replace the grip and it was fine for a while ( plenty of battery power and all 3 are the new "W" batteries. I have auto sleep mode turned "OFF". Frustrating to say the least as I did miss some good shots. Has anyone else had this and if so are Fuji aware?