I run into the same issue with postgres 15.
The column definition (in Kotlin):

  @Column(nullable = false)
  @Basic(fetch = FetchType.EAGER)
  @Lob
  var conclusion: String = ""

The schema update statements, generated by hibernate:

alter table if exists "article" 
  alter column "conclusion" set data type oid;

alter table if exists "article_audit" 
  alter column "conclusion" set data type varchar(255);

When I use java.sql.Clob as field type, then the audit conclusion column is generated as oid as well.
But this is not realy an option, because I needed to rewrite a bunch of columns.