Saving graph as PNG blocked

[neilh10]

While doing a working view of data collected on a real stream study, https://monitormywatershed.org/tsv/TUCA_PO03/4802/ I attempted to save the graph using the three horiz "Chart Context Menu" on the top right, as a PNG It generated a "blocked screen" The workaround, is to regenerate the graphs and then use the snapshot editor to capture it