[Bug]: attributes are moved to allOf instead of in the root of an object after updating from 6.5.0 to 6.6.2

[DerGary]

Describe the bug

The left side is generated through swagger cli with version 6.5.0 of the library, and the right sight is generated after updating to 6.6.2: When this is now used to generate a client from it it contains the following properties:

Expected behavior

Left Side

Actual behavior

Right Side

Steps to reproduce

Create an empty type that inherits from a base class. We are using UseOneOfForPolymorphism as well as:

[SwaggerDiscriminator(ConnectionType.TypeDiscriminatorPropertyName)]
[SwaggerSubType(typeof(HttpConnectionConfigDto), DiscriminatorValue = ConnectionType.Http)]

Exception(s) (if any)

No response

Swashbuckle.AspNetCore version

6.6.2

.NET Version

net8.0

Anything else?

No response