Here's how to duplicate it.
1. Close all
2. Open a Bible search. Search for All Bible Text in 1 Chronicles, NIV, for "Solomon".
3. Close the Search window (do not do a Close All!)
4. Open NIV.
5. Go to Zechariah 6.9
6. Highlight "word of the Lord", and right click. Select "Search this resource".
The search pane that comes up, searches only in 1 Chronicles (that's a left over) in stead of search the whole Bible! If you do a Close all it gets reset properly.
Also, the same old default gets left over if I pick for example "Words of Christ in a Search, then close the window, then bring up NIV, and do a right-click Search this resource.