Issue Summary

Some Jira Expressions, when used on the 'Create' transition in, say, validators or conditions in a workflow are unable to find fields when they are not set.

This is strangely not happening when tickets are created, but affects import of issue via CSV.

Steps to Reproduce

1. Use Jira expressions on workflow create transition
   Example:

   (issue.customfield_10200 == null || [1,2,3,4,5].includes(issue.customfield_10200)

1. Try to import issues via CSV

Expected Results

If the Jira expression returns true, the CSV import operation succeeds and issue is created.

Actual Results

The CSV import operation fails
Error: Error when transforming object to bean

Workaround

Remove the Jira expression validators in the workflow Create transition to perform the import.
If Jira expression is used via ScriptRunner, disable the validator and import the issues.