Rasa X 0.40.x helm chart install fails on nginx image pull

Installation previously worked, helm update fails, so tried a helm uninstall / install.

GCP now complains of:

** Back-off pulling image “rasa/nginx:0.40.0”: ImagePullBackOff. **

Same issue with 0.40.1, does this image exist?

We’ve been having lots of stability issues with Rasa X over the last couple of months. Is there a recommended ‘stable’ release?