No other errors are in available, and the build does not even start a log. Sifting through logs explorer with no filter also doesn't yield a smoking gun.
Retrying the build normally fixes it, although it can happen 2-3 times subsequently.
Any ideas of how to investigate this issue? Or common causes of this phenomenon?
Couple interesting things about the build:
It's a GitHub repo which hosts the code and cloudbuild.yaml
It is run in a private pool. The private pool's network is peered with a private GKE cluster network via VPN tunnel, as the build does some K8 deployment.
Tried going through all other logs.