Sounds like quality control at the Fuji China plant is taking a hit from Covid 19 . Have 10 Fuji lenses that I’m happy with and was looking to acquire the xt4 .Experience from my xt1 tells me that a freeze is fixed with a new motherboard ie. Off you go …back to factory but what worries me more is when the camera seems to be unable to rapidly refocus on the nearest object (which is the bread and butter of any event photographer). Hope to hear good news soon .