Unfortunately it has a habit of jumping around due to its asynchronous weird fuzzy search. So when typing fast you sometimes randomly launch the wrong action. It is especially inconsistent, because files are also indexed and by default it also includes web searches so the behavior is always changing.

I believe this got introduced with Windows 10 and feels just bad. Unless you are typing slowly and actually scan the results the search is doing a bad job as an application launcher like it was with Windows 7 for example.