I have various statistics on the dashboard of the type content vs time, output vs time, or some using the pin to dahsboard directly from the process flow. The thing is that sometimes I run my model and the graphics are not constructed. When that happens I have to reselect one of the objects of any of the graphics and it works again, but after a while, the graphics stop working again. which is the reason for this? is anything that I can do in order to avoid this?