I have been using PP for a few days (2.20). Today the graph stopped while the timeline continued. Nothing I did made the graphing resume, so I exited and reopened, after which operation was normal.<br><br>

The upper graph can be zoomed in on a time period other than the currently collecting period. If you double-click on the lower graph, the upper graph focuses in on the time period you clicked on the lower graph (you can see this because there's a light "focus" rectangle around the data that's being displayed in the upper graph).<br><br>To reset the focus back to the current period, right-click on the lower graph and select the "Reset focus to current" option. If this option doesn't exist, then you're already looking at the current time period.<br><br>I suspect that this is what you ran into. Let me know if this happens again and this doesn't get you the results you expect.<br><br>