The reason seems to be the following line:

at org.hibernate.type.descriptor.java.InstantJavaDescriptor.unwrap(InstantJavaDescriptor.java:70)

/*

• Workaround for HHH-13266 Closed (JDK-8061577).
• Ideally we'd want to use Timestamp.from(), but this won't always work.
• Timestamp.from() assumes the number of milliseconds since the epoch
• means the same thing in Timestamp and Instant, but it doesn't, in particular before 1900.
  */
  return (X) Timestamp.valueOf( instant.atZone( ZoneId.systemDefault() ).toLocalDateTime() );