Yes my Xt4 since the new update 1.21 is freezing up, going dark. Not responding sometimes when turning on or after a few minutes freezing up. I have to turn it off then take out the battery then it will work for a little while longer before going dark and freezing up again. I’ve also noticed that some photos aren’t saved to my RAW SD card but will show up in the SD card I have set up for jpegs. Taking a photo and then trying to view it, zoom in then exit will also make the camera freeze up again