Duration of the outages raised for few changes are showing as 0 seconds.

[shindeprati]

The issue affects only a limited number of Change Request/Outage records.

I noticed that, updating and saving the Start Time or End Time recalculates the outage duration correctly. I have been unable to identify the root cause could you please assist me with this. Thanks in advance.

[Dr Atul - LNG]

Check this

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB2817016