The tip "search string for the filter" keep appearing in any window

I'm not sure about the reproduce steps.  Probably put the mouse on the search box and press ctrl+tab to switch windows, 

When a problem occurs, this prompt will always be displayed on the top of the screen unless close logexpert.

<img width="866" height="293" alt="Image" src="https://github.com/user-attachments/assets/f72e88b8-f952-4048-b022-b6d82bab2356" />