When importing CSV Manual test steps, if the step has a comma char, there is an error

Hello, we are trying to import a test case definition from a .csv file.

If there is a comma char "," inside the test step definition, the import fail

2015-09-10 14:41:57,476 ERROR - Fatal error during import
com.atlassian.jira.exception.DataAccessException: com.atlassian.jira.issue.customfields.impl.FieldValidationException: Error occurred while deserializing JSON test steps
at com.atlassian.jira.issue.fields.CustomFieldImpl.updateIssue(CustomFieldImpl.java:1293)
at com.atlassian.jira.web.action.issue.IssueCreationHelperBeanImpl.updateIssueFromFieldValuesHolder(IssueCreationHelperBeanImpl.java:210)
at com.atlassian.jira.bc.issue.DefaultIssueService.validateAndCreateIssueFromFields(DefaultIssueService.java:848)
at com.atlassian.jira.bc.issue.DefaultIssueService.validateCreate(DefaultIssueService.java:812)
at com.atlassian.jira.bc.issue.DefaultIssueService.validateCreate(DefaultIssueService.java:163)
at com.atlassian.jira.bc.issue.DefaultIssueService.validateCreate(DefaultIssueService.java:150)
at sun.reflect.GeneratedMethodAccessor1158.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.atlassian.plugin.osgi.hostcomponents.impl.DefaultComponentRegistrar$ContextClassLoaderSettingInvocationHandler.invoke(DefaultComponentRegistrar.java:134)
at com.sun.proxy.$Proxy145.validateCreate(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1158.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)
at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:56)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:39)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.osgi.service.importer.support.LocalBundleContextAdvice.invoke(LocalBundleContextAdvice.java:59)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at com.sun.proxy.$Proxy2131.validateCreate(Unknown Source)
at com.atlassian.jira.plugins.importer.imports.importer.impl.CompatibilityUtil.validateCreate(CompatibilityUtil.java:128)
at com.atlassian.jira.plugins.importer.compatibility.CompatibilityBridgeUtils.validateCreate(CompatibilityBridgeUtils.java:155)
at com.atlassian.jira.plugins.importer.imports.bulkcreate.engine.BulkCreateDataImporter.doImportIssues(BulkCreateDataImporter.java:227)
at com.atlassian.jira.plugins.importer.imports.bulkcreate.engine.BulkCreateDataImporter.runImporterEngine(BulkCreateDataImporter.java:173)
at com.atlassian.jira.plugins.importer.imports.bulkcreate.engine.BulkCreateDataImporter.doImport(BulkCreateDataImporter.java:148)
at com.atlassian.jira.plugins.importer.imports.importer.impl.ImporterCallable.call(ImporterCallable.java:26)
at com.atlassian.jira.plugins.importer.imports.importer.impl.ImporterCallable.call(ImporterCallable.java:15)
at com.atlassian.jira.task.TaskManagerImpl$TaskCallableDecorator.call(TaskManagerImpl.java:528)
at com.atlassian.jira.task.TaskManagerImpl$TaskCallableDecorator.call(TaskManagerImpl.java:491)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at com.atlassian.jira.task.ForkedThreadExecutor$ForkedRunnableDecorator.run(ForkedThreadExecutor.java:254)
at java.lang.Thread.run(Unknown Source)
Caused by: com.atlassian.jira.issue.customfields.impl.FieldValidationException: Error occurred while deserializing JSON test steps
at com.xpandit.raven.customfield.ManualTestStepsCustomField.getSingularObjectFromString(Unknown Source)
at com.xpandit.raven.customfield.ManualTestStepsCustomField.getValueFromCustomFieldParams(Unknown Source)
at com.xpandit.raven.customfield.ManualTestStepsCustomField.getValueFromCustomFieldParams(Unknown Source)
at com.atlassian.jira.issue.fields.CustomFieldImpl.updateIssue(CustomFieldImpl.java:1287)
... 44 more