Bug in Gmail

I use gmail a lot. Its fastest and simple though I have not noticed it takes some more time to load recently. I found a bug and would like to share. The following are the steps:-

1. Send an email to friend.
2. Your friend replies to same email(with some content)[Call him to do it for you :-) ]
3. Your friend again replies to same email(different content)
4. Delete only last email(not the entire list of emails) you received from your friend.
5. Check the content that is displayed next to subject in inbox. This content is from deleted email. I think that it should not be from deleted email(since deleted content should not never be shown).

You would not notice it if you refresh page.

Of course I have reported it to gmail team.
Happy Bug Finding!!!