Issue Summary

With New Transition Experience enabled, when "Select List (multiple choices)" field type is made required using "Field Required Validator", error is thrown during transitions, even when values are present. In other words, for "Select List (multiple choices)" field type "Field Required Validator" requires field to be updated during the transition, not only to be populated.

This issue does not occur with other field types or when the New Transition Experience is disabled.

Also, in the "Validators" tab of the workflow transition editor, "Field Required Validator" has the following information:

If a value for field Select List (multiple choices) is not provided during the transition, show the following error: This field is required. 

which is not how the "Field Required Validator" works and/or worked with the Old Transition Experience.

There are 2 distinct validators available:

Therefore the above text should be more clear.

Steps to Reproduce

1. Enable the New Transition Experience in your personal settings:
   • Jira Community - New Issue Transition Experience
2. Set up a transition with a transition screen that includes "Select List (multiple choices)" field type and make it required with "Field Required Validator".
3. Fill out the field before attempting the transition.
4. Attempt to transition an issue with values already set in the "Select List (multiple choices)" list fields.

Expected Results

The transition should proceed without errors if all fields specified in "Field Required Validator", have values.

Actual Results

The issue only transitions if the fields are filled out on the transition screen. Otherwise, a validator error message is displayed:

Field Select List (multiple choices) is required. 

Workaround

Disable New Transition Experience or ensure the fields are filled out during the transition process.