It has to be a problem of your installation. I have been using that plugin for years and it works very well, and I have been checking it on a test website and it works perfectly too.

I can fix this if you manage to reproduce the problem on another website.

Sergey Kambalin is by far the best plugin developer we've had,. You just have to look at your list of plugins:

https://developers.oxwall.com/store/user-list/plugin/grey

There is not a single negative comment.1

But I don't think I answered you, he left OxWall for years

The bad thing about you complaining is the risk mentioned in

https://developers.oxwall.com/forum/topic/66276

and to mention this they will erase their plugins and we will run out of them ... These plugins have never needed support and are at a great price. 

In the last couple months I've getting this glitch on the newsfeed on the main page.

ie people will post statuses and it will show up as Username >> Deleted user

It only happens now and then.  But enough to be annoying.

Does anyone know what causes it and how to resolve?

If you get a solution do share here please..