Oh wow. I did a very basic test this morning `ping google.com` and then ctrl+c and it seemed to work okay. Not done any more extensive testing than this though.
Could it be that it's just very flaky on all pixel devices? Or maybe something graphene is doing to harden the OS doesn't play nicely with how it's been implemented?
On my stock firmware Pixel 9 Pro I also corrupted the install a few times.
To be fair, the feature was still labeled as experimental in the dev settings when I enabled it.