Custom field values overwritten or set on modal transition

Summary

If a user selects a JIRA issue launching into the modal window and chooses a workflow transition, custom field values are overwritten or defaulted if there is a transition screen provided. Field value being overwritten occurs with an optional multi-select field. A default value being selected occurs with an optional single select field.

Steps to Reproduce - 1

1. Define a custom field (multi-select or single select) in JIRA, e.g. "Colors".
2. Add this field to a project, e.g. "GUS"
3. Create an issue in JIRA, e.g. "GUS-1" and assign a value, e.g. "Green", to this custom field.
4. Make a commit and comment with the JIRA issue ID.
5. In FishEye click on the JIRA issue ID from the recent activity.
6. Transition the issue by clicking "Done".

Expected Results - 1

The value visible in JIRA in the custom field, e.g. "Green", is also visible in the modal window.

Actual Results - 1

The custom field is visible without a value:

If the issue is transitioned, the existing data "Green" in JIRA is removed or the value is overwritten.