Consider the buttons “Replay”, which can be used to replay a solution with the internal sounds, and “Play Youtube”, which can be used to replay a solution from Youtube. (albeit with a glitches on each loop).
Now, if I use the mouse on either of those buttons, it will correctly stop/start either the internal playback or the Youtube playback, each to it’s own.
However, using the Spacebar will start the Youtube playback even directly after having just used the Spacebar to Stop the internal playback.
Please fix to make the Spacebar a true toggle off/on, off/on, etc. for whichever playback is in operation.