What nvidia driver have you got installed? What version? With nvidia drivers, it's best to install direct from nvidia as the PCS one will be outdated.
I don't know how Agisoft works, but I'm guessing it's perhaps not accessing the dGPU and therefor crashing the iGPU? It's a possibility, may be worth running it purely on the dGPU through nvidia control center.
Hi
The driver version is direct from nVidia and is 25.21.14.1935
How would I change the software to access dGPU?