I noticed a minor bug recently in the recent call log. When I open call log the default view ("Recent Calls") shows the information correctly, with recent calls marked as "Today", "Yesterday", "Last Week", and "Older".

However, when I tap the top bar ("Recent Calls") to select a category (Missed, Received or Dialed), and then revert back to "Recent Calls", it messes up the time stamps and doesn't group the call logs correctly.

Pardon me if it doesn't make a lot of sense, but you can try it by following the steps:

1. Open call log through 'Phone' app
2. Notice the time stamps, the dates and the description match (Today, Yesterday, etc.)
3. Tap the top bar that reads "Recent calls" and select any of the options "Missed, Received or Dialed"
4. The time stamps for the filtered list still matches
5. Now tap on the top bar again and select "Recent calls" and you'll notice that the time stamps and descriptions don't match. Today will actually include calls from today, and two past days, similarly yesterday and last week!