[BUG] Jandex "Not a parameterized type" with @Data pojo

[chonton]

Describe the bug
I've got two simple pojos -

@Data
public class Entity {
  private List<@Valid User> users;
}

and

@Data
public class User {
  private @NotBlank @NotNull String users;
}

When I run jandex over these pojos, I get a 'Not a parameterized type' failure

To Reproduce
See wildfly/jandex project for a reproducer

Expected behavior
No Exceptions

Version info (please complete the following information):

• Lombok 1.18.6
• javac 11.0.1

Additional context
If I remove the lombok generated setter by adding following setter, there is no exception. This leads me to believe there is a subtle difference in the generated code.

  public void setUsers(List<@Valid User> users) {
    this.users = users;
  }

Using javap to view the byte, I see the following significant difference

in lombok generated code the setter annotation is

      0: #20(): FIELD, location=[TYPE_ARGUMENT(0)]
        javax.validation.Valid

in hand written, javac generated code the setter annotation is

      0: #20(): METHOD_FORMAL_PARAMETER, param_index=0, location=[TYPE_ARGUMENT(0)]
        javax.validation.Valid