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".