Topic with deleted post isn't disappear from 'Feed subscription' page for logined user

Preconditions:
1. Login to Forum
2. At least one branch created
3. User should have CREATE_TOPIC,
VIEW_TOPIC and DELETE_OWN_POST permissions
4. You should have a topic which
was created earlier and doesn't shown
in 'Feed subscription' page

Steps to reproduce:

1. Go to topic and leave a post
2. Go back to the topic and delete own post
3. Go to main page and click on 'Feed subscription' icon

AR: User weel see the topic in the list of 15 last posts.
ER: User shouldn't see the topic in the list of 15 last posts.