Saving plot as .html file saves older versions as well

Hi,

Since a week Bokeh 0.13 (running on Jupyter Notebook Python 3.6) started to save figure together with some older versions or other figures from the same notebook. I don’t use gridplot or similar multiple figure tool and show() outputs to Jupyter inline very well. Saving the same object however is confused. Could you help?

Thanks,

Tarik