Progress bar keeps growing with dynamically created math

I have a case where math is dynamically created based on user input. Over time, the MathJax progress bar ("Typesetting ...") grows beyond all limits. I wish there was an (official) way of resetting it. I can reset `MathJax.Message.typesetting` etc. by hand, but it feels like MathJax should do this automatically after finishing its job.
