in method org.hibernate.internal.SessionFactoryImpl#determineCustomEntityDirtinessStrategy, if the property value is a Class, then the code was :

if ( Class.class.isInstance( value ) ) {
				customEntityDirtinessStrategyClass = Class.class.cast( customEntityDirtinessStrategy );
			}

but customEntityDirtinessStrategy is null atm, so the customEntityDirtinessStrategyClass is null

same bug exists in org.hibernate.internal.SessionFactoryImpl#determineCurrentTenantIdentifierResolver