Volumes keep disappearing on GKE

Hi, I am playing with Concourse on Kubernetes with GKE. I deploy the Concourse helm chart 6.5.0 on a GKE cluster of the latest version:

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"14", GitVersion:"v1.14.8", GitCommit:"211047e9a1922595eaa3a1127ed365e9299a6c23", GitTreeState:"clean", BuildDate:"2019-10-15T12:11:03Z", GoVersion:"go1.12.10", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"13+", GitVersion:"v1.13.11-gke.23", GitCommit:"93457f9dac45d5f95c2c609232e1ff2343c72684", GitTreeState:"clean", BuildDate:"2020-01-14T06:01:01Z", GoVersion:"go1.12.11b4", Compiler:"gc", Platform:"linux/amd64"}

Over the past weeks, I kept getting errors like

volume ‘80db1b07-6cde-415f-7a21-770772b22f85’ disappeared from worker ‘ci-worker-1’

that apparently come and go at random. It looks like it recovers from this over time but it makes LOTS of my builds fail. Is breaks jobs/tasks but also brings resources into an error state.

What can I do about that?