Hi Kim!
Thank you for looking into this! I get this problem a lot - nearly every day (I use this site a lot, it's fantastic!). It is hard to 100% say what triggers it for me but last time I avoided pausing the class and didn't have any problems.
1) I'm using an Acer laptop
2) Google Chrome
3) None
4) I have yet to test this theory, but it seems to happen after I pause a class and (while paused) press back to the previous picture, then forward again to reset the timer. I do this a lot to avoid missing out on time during fast sketches if I need to change paper or something, so this might be why I get the problem a lot. It doesn't just happen for 30 second drawings for me, it can happen to any length of time.
I also often have the system bug out on me while it's paused, the play button flashes at me and when I try to unpause it the timer shows NA-NA-NA or something like that. This usually happens if I go to another window or tab while it's paused and come back to it. I then have to restart the class to get it to work again. I don't know if it's related but there ya go :)
I hope this helps!
Thank you :)
