JIRA date picker returning wrong format - not respecting configuration in General Configuration

JIRA date picker returning wrong format. It's not respecting configuration in General Configuration.

Date picker returning value in format dd/MM/yy in JIRA version date fields where JIRA default is expecting d/MMM/yy. However, there's no problem with issues date fields e.g. Due Date since the value returned match the expected format - d/MMM/yy.

This issue is still affecting users who have custom date format set in JIRA General Configuration.

Workaround:

• Revert the date picker format(not the ones in Look and Feel) to default.
• Manually change the month in selected date using picker from numeric to its abbreviation e.g. 10 -> Oct.