Unfortunately I can't repeat what you describe. I'm running Win11 with calibre portable 8.2.1, not from source.
Some initial differences:
- There is a VL selected that hides the Tolstoy book. I left it there.
- The order of the books is different. "Edmond Burke" is the second book. I sorted by title to fix this, then restarted.
I initially see this:
I selected the first book, "Edmond Burke", then did what you specify to open a locked book details window. I see this, which is what you said I should see.
I tabbed 3 times to select the author, then pressed the ≡ key. I see what you said I should see.
I pressed ESC to close the context menu, pressed tab once more, then pressed the ≡ key. This is where things change. I see what I am supposed to see, not what you saw.
FWIW: I also see the correct context menu if I tab then backtab.
Did I do something different from what you did?
The only explanation I can think of is that you are running some keyboard assist or accessibility programs that I don't have.