Hope your problem is solved by now.
I can tell you about an issue I had two weeks ago with my brand new X-Pro3, when on holiday in Italy = 30 degrees C. Visiting narrow and hot alleys in Napoli the EVF wouldn’t work properly - it many times didn’t work at all. Had to turn the camera on/y time I wanted to shoot via the EVF. Guess the camera couldn’t cope with the temperature in the warm weather/sun. Now back in Copenhagen were I live, and the temperature/weather is of another (not so warm) level, the camera/EVF works well.
One could wish that the equipment would be more reliable in such circums.tances but it seems that production processes these days doesn’t make room for such perfection...
Best regards.
