C1 IPHONE Tethering, My camera keeps freezing. shutter doesn't work. OMG

I'm using Capture One Mobile with GFX50S2, and while shooting tethered in RAW, my camera keeps freezing. The shutter doesn't work, and I have to remove the battery to turn it off – a frustrating situation. I'm using an official adapter and a high-speed cable. Are there any other users facing a similar issue?