Issue Summary

Issue was introduced in Jira 8.14.0.
Select List (multiple choice) Custom fields type are not rendered correctly with dark feature (multiselect.frother.renderer) enabled.

Steps to Reproduce

1. Enabling a Dark Feature through the page below:

   <Jira_URL>/secure/admin/SiteDarkFeatures!default.jspa

   1. Add "multiselect.frother.renderer"
2. Create a new project
3. Create a new Select List (multiple choice) Custom fields type
   1. Add 7 to 10 choices to the Select List CF
   2. Add the CF to the Edit/Create screen
4. Create an issue and select all the 'Select List CF' choices
5. Click on Edit issue

Expected Results

Custom field values should display correctly as in 8.13.x

Actual Results

Custom field values are not displayed correctly as in 8.13.x

Workaround

Select List (multiple choice) Custom fields type are rendered correctly with dark feature (multiselect.frother.renderer) disable but the autocomplete feature for multi select boxes is missing.