Duration issue in listing and record details

Steps
1. Log in to Lingo website
2. Click on View Records
3. Check for duration

Description
The duration column shows **Duration: Invalid duration**
(If not refresh the page once)

Steps
1. Log in to Lingo website
2. Click on View Records
3. Open a record
4. Check for Duration field it shows **Infinity:NaN**

**

**

Reproduce the issue on the Lingo website by following the listed View Records and record-detail steps, checking both the duration column and the Duration field before and after refreshing. Trace the duration display from the records listing and detail views, then verify that both show a valid duration instead of “Invalid duration” or “Infinity:NaN”.

Written by the indexing model from the issue text.