Deleting a value is not supported in dependencies

[Thorndike]

Output of helm version:
v3.14.0
Output of kubectl version:
v1.20.5
Cloud Provider/Platform (AKS, GKE, Minikube etc.):
vanilla Kubernetes

I found multiple descriptions on how to delete a value in a helm configuration by overriding it with null. This works fine if I use a helm chart directly. In the case that I use a helm chart as a dependency this no longer gives the desired result. I can override the value with different values but no longer delete it by overriding it with null.

[gjenkins8]

yes, unfortunately this is a bug. I have been trying to find time for the last few weeks to track it down.

[rptaylor]

This is yet another duplicate of #12488

[mbaldessari]

I am hitting some variant of this but not exactly like #12488 (which is slightly different). The problem I am seeing is that keys in subcharts are correctly removed, but not in subsubcharts (my use case is using the gitea helm chart as a dependency. gitea brings in a few other subcharts with it). My full repro with docs is here: https://github.com/mbaldessari/helm-issue/blob/subsubchart/

[zsolt-marta-bitrise]

Seeing something similar here #12991. I added a minimal example.

Works if we set the dependent object to empty string "" instead of null