Content disappear if title is empty

Hello I notice if create a post without title and you try to publish the content disappear.

I try many thinks and I discover this happen if you have only one post template enabled and this template is not the default blank post template.

If you have two or more post templates published this not happen
if you have only the default blank post template this not happen

To reproduce the problem
1. publish only one post template for example "Template for News"
2 login to front end as admin or as any other author
3 make a post without title but make some change in body
4 press publish button

This happen also if you have two post templates published but the one template is not global and author don't have access, so have access to one post template.


Regards.

Thodoris