Schema.title doesn't works

[jurogrammer]

Describe the bug
Schema.title doesn't rendered after openapi updated from 2.6.0 to 2.8.5

To Reproduce
Steps to reproduce the behavior:

@RestController
class UserController {

    @PostMapping("/users")
    @Operation(summary = "create user")
    suspend fun createUser(@RequestBody user: User): User {
        return User(1L, user.name, user.email)
    }
}

@Schema(description = "userInfo")
data class User(
    @Schema(title = "id")
    var id: Long?,
    @Schema(title = "someName")
    val name: String,
    @Schema(title = "someEmail")
    val email: String
)

• What version of spring-boot you are using? 3.4.3
• What modules and versions of springdoc-openapi are you using? 2.8.5

Expected behavior
title should be rendered

Screenshots
actual:

Additional context

• springdoc.api-docs.resolve-schema-properties=true doesn't works

[Mattias-Sehlstedt]

This is most likely tied to how swagger-ui renders the OpenAPI 3.1 specification.

The default specification was changed in 2.8.0 (#2790). If you revert to 3.0.1 then I assume it would retain the previous behavior.

You can easily modify the specification version by setting springdoc.api-docs.version=openapi_3_0 in your properties.

[jurogrammer]

@Mattias-Sehlstedt Thank you for your kind and detailed explanation.
have a good day!