Custom permissions
Add the “Leave Review” button
Duplicated item assignees stored in the database in some cases
Display the full name of the assignee in the checklist item that has a username as a shortcode (letters with numbers)
"PG::UniqueViolation: ERROR" message while JCMA migration
You could enable custom permissions to view and work with Smart Checklist from Admin Console. The Smart Checklist settings page has a separate tab - Permissions.
Manage Project permissions available:
Add Smart Checklist Items - Ability to add checklist items, view template list, and save/apply a template.
Set status of Smart Checklist Items - Ability to change the status of checklist items.
Delete Smart Checklist Items - Ability to delete checklist items.
Manage Smart Checklist Items - Ability to add new checklist items, edit, delete, change order, change status, view template list, import and save templates.
View Smart Checklist - Ability to view Smart Checklist on the Jira issue page.
Read more details here: Permission & Access
You could leave a review by clicking on a 
button. There is an option available in the pop-up to hide this button and don’t show it again:
If you are using shortcodes as a username for users in your Jira instance like this:
In the checklist item when you assign it to a user it will be displayed as a full name.