Howdy,
It seems that the quicksearch behaviour is not 100% the same (yet) for the new titlebar quicksearch.
In older versions when you clicked on the search text field the result list refreshes.
In 7.50 beta 1 this doesn't do anything.
When you press enter thinking that it will search again it just jumps to the source without refreshing the list.
The only way to get the refresh working is removing and (re)adding the character.
The single click refresh was for me handy to find and remove quickly added log lines or something like that.
A single click revealed if I forgot something or not.