Hi @gmoleon1,
I stumbled on your unanswered question while doing a community cleanup. My best advice for this situation would be to make sure both your operating system and browser version are as up to ate as possible. Canvas usually works with the two most recent browser versions, so you do need to have a fairly updated system for best compatibility. You could also try try clearing your browser cache to see if that has any positive impact.
Hope this helps!
-Chris
