If I do a search with 4 words or more, when clicking on page two of the search results the search phrase in the search box drops to 3 words all the time.
For example "red car in water" when clicking page 2 changes to "red car in"
On MLF search for "Release of version 2.4" when you click on page 2 of the search results the search phrase in the search box changes to "Release of version".
I can confirm that. It seems to affect not only the search input field itself because I get 173 results (currently) with the search term "Release of version 2.4" and one can see that the results on the later pages do not match the "2.4" part but only the search for "Release of version".
So the thing is that the search is obviously limited to three words but one can input more than the three allowed words. I expect this limitation to be introduced because of performance issues with the resulting database query.
Because of possible DoS attacks IMHO we can not completely remove the search-word-limit and a higher limit will lead to a situation when someone could ask, why the limit is at six, eight or twelve words.
We should discuss if there is a need for a limit (IMHO there is) and if so, where to set it.
Trenne niemals Müll, denn er hat nur eine Silbe!