In our OpenAPI V3 Schema, for a GET endpoint, we have a query parameter called filter which contains a set of properties. Those properties appear as top-level when viewed in the UI (or shown in the published Docs). The behaviour should be that those properties appear inside the filter object, as is the case with the Swagger official editor. Screenshot 1 shows the Swagger editor with the expected schema, whereas the faulty output is shown in API Dog in screenshot2.
Thank you for your feedback. We will look into this issue.