Proxmox Host unresponsive after starting VM with PCI Coral TPU passed through

This is driving me nuts - I hope someone can help. I am trying to pass-through a Coral Edge TPU M.2 through to a Debian VM to run Frigate there, and every time I start the guest the Proxmox host goes unresponsive for some 30 seconds with a communication failure (0) spin box, the Start operation returns Error: start failed: QEMU exited with code 1 and then the host restarts. The Proxmox host is v. 8.2.4, completely updated. I have been following instructions here and...

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