This is a regression of JRASERVER-59495

Summary

The "Log Work" functionality is using the JIRA System "Default user time zone" to set the "Date Started".
It should be using the "User Time zone" set in the Profile section

Steps to Reproduce

Go to an issue, click on "Log Work" and check the Time in "Date Started"
Change your user timezone by going to your Profile
Refresh the issue
Click on "Log Work" and check the "Date Started" field again
Expected Results
The Time defaults to the timezone recently set in the profile

Actual Results

The Time remains the same as before because it still uses the JIRA "Default user time zone"

Notes

Changing the JIRA "Default user time zone" under "General Configuration" will change the time shown by default by the "Log Work", confirming the link between them.
All other dates in the issues, such as Created, Updated, Comment times, change accordingly to the user timezone.

This behavior is reproducible in 7.13.5, 8.2.1, and 8.2.4 by adding the Log Work field to a new custom screen (in that case the default Log Work field displays the user's preferred time zone – but the custom screen displays incorrectly.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available