Atem Streaming Bridge output very unstable / pixilated

I am using an ATEM Mini Pro Iso with two PTZ cameras and two laptops connected, and I am trying to use the Streaming Bridge to send a video output to a separate monitor / recorder (Black Magic Video Assist 4K) via HDMI and/or SDI.
I have updated the software on both the ISO and the Streaming Bridge (SB)
I have everything networked through a network switch, using a PC to run the ATEM software, seeing both the ISO and the SB.
Everything looks good on the multiview, all signals are clean and stable.
When I click "ON AIR" I see the video output fine in my monitor, but then after about two minutes, it starts to be pixilated and glitchy. If I shut everything down and start over, the video is clean at first but then gets glitchy.
I have tried all the different settings for the streaming outputs (Streaming High, Med, Low, Hyperdeck High, Med, Low).
I have also tried changing the output resolution on the ISO to 1080@60, 1080@30, 1080@29.97.
Also tried putting the ISO and SB on their own network switch apart from PTZs.
Also connected an SDI directly from the PTZ camera to the SDI Ref on the SB for reference.
Nothing changes.
Please help.
I have updated the software on both the ISO and the Streaming Bridge (SB)
I have everything networked through a network switch, using a PC to run the ATEM software, seeing both the ISO and the SB.
Everything looks good on the multiview, all signals are clean and stable.
When I click "ON AIR" I see the video output fine in my monitor, but then after about two minutes, it starts to be pixilated and glitchy. If I shut everything down and start over, the video is clean at first but then gets glitchy.
I have tried all the different settings for the streaming outputs (Streaming High, Med, Low, Hyperdeck High, Med, Low).
I have also tried changing the output resolution on the ISO to 1080@60, 1080@30, 1080@29.97.
Also tried putting the ISO and SB on their own network switch apart from PTZs.
Also connected an SDI directly from the PTZ camera to the SDI Ref on the SB for reference.
Nothing changes.
Please help.