Assignee field broken on screens with Version Picker custom field

The "Assignee" field renders incorrectly and only allows to select the current user if the screen also has "Version Picker" custom field.
Only happens if:

• the "Version Picker" is ordered higher than the "Assignee" in the screen and contains versions
• the screen is visualised from within another issue view (e.g: creating a subtask or a new issue while viewing another)

Environment:

• JIRA 7.1.0-OD-01

Steps to Reproduce

1. Have a Version Picker (single version) Custom Field
2. Have Versions on a project
3. Include the version picker and assignee field on the same screen: e.g: "Create Issue Screen"
4. Place the Version Picker prior to the Assignee field in the Screen
5. While viewing any issue, click "Create" and select the options to visualise the screen just configured.

Expected Results:
Assignee field appears normally and can be filled with a user.
Actual Results:
Assignee appears with a different layout being only a drop-down where it's not possible to enter a user name

Notes:

Browser console logs the error:

Uncaught Cannot create CheckboxMultiSelect without multiple-select select element.

Workaround

• Move the "Version Picker" custom field under the "Assignee" field in the Screen.
• Create an issue from the Dashboard or any other screen that is not the "View Issue" screen