Issue Summary

This is reproducible on Data Center: (yes) / (no)

Steps to Reproduce

1. Step 1
   Configure a date time field to be the first field in the issue create modal
2. Step 2
   Open the issue create modal

Expected Results

The date time field should be autofocused and the calendar should be just below it

Actual Results

The calendar's positioning is wrong and outside the issue create modal

Workaround

Configure the date time field to not be the first field in the modal