Date picker doesn’t appear when creating an issue from an Administrative page

Issue Summary

Date picker doesn’t appear when creating an issue from an Administrative page. Reproduced in Jira Service Management 5.6. This also applies to the Date Picker Time custom field as well.

This is reproducible on Data Center: (yes)

Steps to Reproduce

1. Create a custom field with the Date Picker or Date Time Picker
2. Create\modify a screen with above fields
3. Navigate to an Administrative page (⚙ > (Applications, Projects, etc)
4. Select Create via the Top
5. Click the calendar button for the Date Picker field.

Expected Results

Calendar should appear

Actual Results

Calendar does not appear

Workaround

Navigate to home page and Create