Creating a new class in the assets/scripts folder doesn't set the namespace

When creating a new class in the Assets/Scripts folder using the Unity explorer in Rider doesn't fill in the namespace (defaults to DefaultNamespace) correctly even though the root namespace is set in Unity. This does work when done in a sub folder of the scripts folder.

Reproduce the issue by creating a class in the Unity explorer in Rider directly under Assets/Scripts, then compare it with creation in a subfolder. Trace the namespace-generation entry point for those two locations and verify that the configured Unity root namespace is used instead of DefaultNamespace. Done means both locations produce the expected namespace.

Written by the indexing model from the issue text.