1. Open my attached project Drag Selection scene.
2. Write "rock" in hierarchy search input field
3. Using drag action select all items in scene (see user .gif for clarification)
4. Clear search window input field using x button
5. Using drag action select all items in scene
Notice that only items that are part of last search query ("rock") are being selected.

Expected result: All items in scene are selected when search input field is clear
Actual result: Only objects, which fit last query of search input field are selected.