Answer card doesn't revert to "?", previous answer remains

Hi. Thanks for the superb app, loving it as always.

However. in pracitce, for the last couple of days I have target-language-word A on the left and “?” on the right. I click the “?” and answer A comes up as usual. Then I click the left card for a new target-language-word-B on the left and on the right instead of “?” I still have answer A sitting there. This happens on different browsers, after logging in and after closing and opening the browser.

I tried to reproduce this but couldn’t. Is this still happening for you? Which browser and operating system are you using? Is there any other info you can provide which might help me to reproduce this?