Not sending community messages in the widget on the site?

Question

In contact with

Chrome browser, normal view, VKontakte widget loads and sends messages.
In the browser, we make a mobile view here

and refresh the page, the messages do not go away. VK returns an access error.

The difference in the request is only in the presence of hash

Further knowledge is not enough. Maybe someone saw this?

Answer 1

Answer from VKontakte support:
We apologize for the long wait.
Unfortunately, when exiting from mobile devices with a widget, a lot of different problems can occur.
The developers are aware, but so far nothing has been heard about the fix. And to adapt it to mobile is not yet possible.