Keyboard shortcuts cease working after a few sentences in sentence view.
This includes a for play audio, shift t for translate, right/left arrow to move between words, number keys to mark a word’s known state, shift right arrow for next sentence, etc.
I can refresh the page to bring back functionality, but the problem recurs often.
Might be something simple. I occasionally hit the Caps Lock key accidentally or, more often, one of my cats takes a shortcut across the keyboard. Shortcuts only work in lowercase. Takes me awhile to realize it.