Hi @redsun,
Thanks for the post.
This issue might be as a result of the code that you are using.
Please try the following snippet which makes use of the unset() function:
//removing fullscreen from basic toolbar
if( ($key = array_search('fullscreen' , $toolbars['Full' ][2])) !== false )
{
unset( $toolbars['Basic' ][2][$key] );
}
// return $toolbars - IMPORTANT!
return $toolbars;