While migration to OpenAPI 3.1.0 all Schema objects becomes JsonSchema. 3.1.0 deserializes schema "type" to array field "types". At least this part of SchemaDiff works incorrectly: SchemaDiff.java#L349-L352. Most probably such changes will affect other parts of library.
Activity
[-][OpenAPI 3.1.0 support] JsonSchema type change not handled.[/-][+][OpenAPI 3.1.0 support] JsonSchema changes not handled.[/+][-][OpenAPI 3.1.0 support] JsonSchema changes not handled.[/-][+][OpenAPI 3.1.0 support] JsonSchema type changes not handled.[/+]