I just bought recently a used Fuji X-T2 (2 years old) with very few shots (the camera is in like new condition), the camera is perfect for my kind of use (as a hobby) but I came across with a huge problem: when the battery is at 80% or less and using the mechanical shutter, after pressing the shutter button to take a photo the camera goes completely black on the LCD and EVF and freezes. I can't even turn off the camera and need to remove and replace the battery. It just crashes every single time I try shooting with mechanical shutter. Using the electronic shutter the camera works normally.
Using the mechanical shutter, the camera works perfectly only when the battery is fully charged.
Both firmwares (Body and Lens) are updated with the last version available.
Please, if anyone could tell me something about this problem I would appreciate that!