Atem Mini ISO continually crashes w/ 3 cams, fine with 2

Hello, I have been trying to get this to work for ages to no avail. If anybody has ideas PLEASE help.
We have a 3 cam setup for video podcast recording where we need ISO files. When there are 3 cams, Atem will ISO record for 10-20 minutes and crash. We recently replaced HDMI cables with high end fiber optic, two 10 foot, one 15 foot with a signal booster. The 15 foot with signal booster works fine when only 2 cams attached.
Cameras are 3 Sony ZV E10s outputting 1080p at 24fps. ATEM set to 24 fps. Hard drive is a 1tb OWC envoy pro electron formatted exfat with original usb cable. Tried different high speed cables and same result...
I am at a loss for what this issue could be. I have tested every possible configuration. Even different power outlets/power strips. Is there anything I am missing here?
Thank you!
We have a 3 cam setup for video podcast recording where we need ISO files. When there are 3 cams, Atem will ISO record for 10-20 minutes and crash. We recently replaced HDMI cables with high end fiber optic, two 10 foot, one 15 foot with a signal booster. The 15 foot with signal booster works fine when only 2 cams attached.
Cameras are 3 Sony ZV E10s outputting 1080p at 24fps. ATEM set to 24 fps. Hard drive is a 1tb OWC envoy pro electron formatted exfat with original usb cable. Tried different high speed cables and same result...
I am at a loss for what this issue could be. I have tested every possible configuration. Even different power outlets/power strips. Is there anything I am missing here?
Thank you!