[Sybase] java.lang.ClassCastException: java.sql.Timestamp cannot be cast to com.sybase.jdbc4.jdbc.DateObject

Problem
In my spring boot project, it will occur the following ClassCastException irregularly:

java.lang.ClassCastException: java.sql.Timestamp cannot be cast to com.sybase.jdbc4.jdbc.DateObject
 at com.sybase.jdbc4.tds.TdsParam.checkDateRange(TdsParam.java:1707)
 at com.sybase.jdbc4.tds.TdsParam.prepareForSend(TdsParam.java:997)
 at com.sybase.jdbc4.jdbc.ParamManager.checkParams(ParamManager.java:1192)
 at com.sybase.jdbc4.tds.Tds.language(Tds.java:1022)
 at com.sybase.jdbc4.jdbc.SybStatement.sendQuery(SybStatement.java:2557)
 at com.sybase.jdbc4.jdbc.SybPreparedStatement.sendQuery(SybPreparedStatement.java:3191)
 at com.sybase.jdbc4.jdbc.SybStatement.execute(SybStatement.java:2829)
 at com.sybase.jdbc4.jdbc.SybPreparedStatement.execute(SybPreparedStatement.java:1566)
 at com.zaxxer.hikari.pool.ProxyPreparedStatement.execute(ProxyPreparedStatement.java:44)
 at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.execute(HikariProxyPreparedStatement.java)
 at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.execute(ResultSetReturnImpl.java:128)
 at org.hibernate.id.IdentityGenerator$InsertSelectDelegate.executeAndExtract(IdentityGenerator.java:87)
 at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:42)
 at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2933)
 at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3524)
 at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81)
 at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:637)
 at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:282)
 at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:263)
 at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:317)
 at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:318)
 at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:275)
 at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:182)
 at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:113)
 at org.hibernate.jpa.event.internal.core.JpaPersistEventListener.saveWithGeneratedId(JpaPersistEventListener.java:67)
 at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:189)
 at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:132)
 at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:58)
 at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:783)
 at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:768)
 at sun.reflect.GeneratedMethodAccessor253.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:305)
 at com.sun.proxy.$Proxy162.persist(Unknown Source)

How-To
When I remove DYNAMIC_PREPARE=false parameter from my datasource url, ClassCastException does not happen so far.
But the root cause is still unknown.