↑ ↑ ↑ ✔
Is it just Y/N cells?
What happens if you press F2 on the cell you want to Edit, do the edit, and then press Enter to exit edit mode?
Added: Is this happening in the last cell of the last line in the book list, I just noticed 3-4 Tabs there will land me in the Search bar
BR (windows 10, calibre 7.12)