Window Timers and Toggle button out of sync

[JannieP]

Open page, add OpenSpritz, select text, Select WPM
The spritz will start.
Click Pause.
Now select another WPM, this will start Spritz again.
Now click Pause again...
Now it just switches to the previous WPM.
Now select a WPM, 3rd Time Lucky...
This will start a third timer.

Now click the play pause button repeatedly, this will totally confuse the timers and you will end up with a crazy bunch of flashing text.