[cdk-pipelines] cdk deploy breaks when bootstrapping with --qualifier

I am bootstrapping a new environment using the following command:

cdk bootstrap --profile PROFILE_NAME --cloudformation-execution-policies arn:aws:iam::aws:policy/AdministratorAccess --qualifier=stackname-api

I see that IAM roles are created using the qualifier instead of the random default hnb659fds.

Now when I try to deploy the stack running cdk deploy --profile PROFILE_NAME I am getting the following error

Could not assume role in target account (did you bootstrap the environment with the right '--trust's?): User: arn:aws:sts::XXX:assumed-role/AWSReservedSSO_AdministratorAccess_XXX/SOMESTUFF is not authorized to perform: sts:AssumeRole on resource: arn:aws:iam::XXX:role/cdk-hnb659fds-deploy-role-XXX-us-east-1

Which makes sense since this role doesn’t exist. It should try and assume the role with the qualifier instead.

Environment

• CLI Version : 1.52.0
• Framework Version:
• Node.js Version: v14.4.0
• OS : MacOS
• Language (Version): JS

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This is 🐛 Bug Report

[rix0rrr]

Although I could also see those values being read from context by default, so I will take this as a feature request for that.

[rix0rrr]

If you specify a non-default qualifier, you need to supply a DefaultStackSynthesizer to your stack, initialized with the qualifier you used.

This is a failure of documentation.