I haven't seen as issue like this before. If you click the color bar range number (the "1.9" in the lower image), are you able to manually change the value of the plot range? I assume you can't do this, because the plot looks fine except for the color bar.
You can try ctrl-Q (rebuild). You may also want to try updating your Solidworks service pack if you do not have the latest. Let me know if this helps.
I don't have access to dynamic studies but if this were a static study, I would check the scale of your plot as it appears to be set incorrectly. The max and min are the same value. I would adjust this to have the max/min that you are interested in, say 0-2.4 as in the non-time-dependent plot. Can you right-click on the plot in the design tree and select 'Chart Options' and manually adjust? That is what I would do for a static study.