GUI appears to refresh graphs continuously even when refresh is stopped

Noticed the other day, when tunneling through ssh to run the maxgui on my local browser, that the CPU would be working very hard for just the shell process itself. Appeared to be related to the graph drawing on the gui. Load would disappear if I went to the Settings page. Refresh was set to "no refresh" but you can see the graphs are still redrawing constantly with no data, and the load on the tunnel is very high.