Safari sidebar jumps back to folder view

I find that there is jump-back behavior in Safari’s sidebar — it looks like Safari thinks I'm done searching and snaps back to folder view. 

MacBook Pro 16" M4 macOS Tahoe 26.1

Tried the following:

• Deleted the com.apple.Safari.plist
• Click Sidebar icon → select Bookmarks > Now typed search in the sidebar search bar
• Deleted what is not needed in Bookmarks → Edit Bookmarks