Though I don’t know if it is a known issue, it seems to me that there is a problem with the buttons being completely hidden when starting review with the window small size. (Buttons does not redisplay when I click on the reviewer.) If the window is large this problem does not occur. (and I am not using the preference to hide the buttons.)
Anki 24.11 (87ccd24e)
Python 3.9.18 Qt 6.6.2 PyQt 6.6.1
Platform: Windows-10-10.0.22631
addons: nothing