Time tracking date format inconsistent in backlog screen for team-managed projects

Issue Summary

When the Time tracking global settings in Jira is set to display the Time in "Hours", the total sprint original estimate displayed on the Backlog screen continues to display the time in "Days" format.

Steps to Reproduce

1. Navigate to Settings > Issues > Time tracking 
2. Ensure the time tracking provider is set to "Jira provided time tracking"
3. Click the Edit global settings button and set the Time display format to "Hours".
4. Create a team-managed project in Jira.
5. Enable the Backlog and Estimation features from the Project Settings' Features page.
6. For the Estimation feature, set the estimation option under  to use Time instead of Story points.
7. Create and add a few test issues to your backlog. Add some data to the original estimate field.
8. Review the format of the time displayed on the Backlog tab. 

Expected Results

The time format of the original estimate is displayed in "Hours" as per the format selected in Global time tracking settings

Actual Results

The time format continues to display in "Days" format

Workaround

Switching to a different tab and then back seems to correct the time format displayed. However, reloading the page will cause the incorrect format to be displayed again.