Hello Kannan,
There were unclosed HTML tags within the items as well. If you leave stray <div> tags, then the layout will break.

Yes agreed, but i believe he is asking about the author alias behavior when filled in and not left empty.

Ok, then I must have mixed up the posts, it happens from time to time :)

Hello,
Kannan understood me right. When the Alias Author is empty, all works. Every Author can edit their articles.
But when this field is filled with xyz the complete Article disapears from the Authors Edit-View and its only from Superadmin in Backend possible to edit.
I think this is an error, because normally in frontend editing the normal users don´t know about the names from other Authors.
One Article is always set to one basic Author. Only a Superadmin should switch this, not a Author!

Hope you find a solution, that i can insert in Frontend another Author to show and be further able to edit my contents.

If you are using an alias, you are automatically assigning the item to another author.
Since the author is changed, the item will not appear in the original author's page.
The alias field treats the item as if it was created by another author.

Ah okay. Is it possible to deactivate this option/field in frontend?

Hello,

You can override the itemform.php file - getk2.org/documentation/tutorials/174-templating-with-k2-and-the-concepts-of-sub-templates or you can use CSS and display: none in order to hide it.