Regression in behaviour of generation in combination with typeMappings [>=4.4.7]

I found a regression while upgrading codegen from 4.4.6 to the latest 5.0.2 but also 4.4.7 fails.

I have a custom PageInfo type like:

type PageInfo {
   hasNextPage: Boolean!
   hasPreviousPage: Boolean!
   totalCount: Int!
}

used in e.g.:

type EngineManufacturerPage {
   items: [EngineManufacturer!]!
   pageInfo: PageInfo!
}

and a DGS code generator config for it like:

packageName = "com.mycomp.graphql"
subPackageNameTypes = "type"
generateInterfaces = true
typeMapping = ["PageInfo": "com.mycomp.graphql.type.IPageInfo"]

In 4.4.6 and before above graphqls would generate a IPageInfo like:

public interface IPageInfo {
  Boolean getHasNextPage();
  Boolean getHasPreviousPage();
  Integer getTotalCount();
}

but from 4.4.7 this is not happening anymore unfortunately...

Could it be something changed in the behaviour?
Other interfaces are generated so I suspect the combination with the typeMapping configuration.