Flow list does not show consistently in Play mode

When i work with a project with multiple flows and then switch to Play mode to listen i often see the flow list at the top left greyed out.
I tried a number of things but i could not find a setting or switch to activate the flow list.
Most often for whatever reason the flow list shows as active eventually. But it is frustrating because it appears random.
Is there something i need to do in Setup or somewhere else?

(I am using Elements 4)

It will be greyed out if you have a selection. This is to avoid problems with the position of the playhead that could occur if you played back from a selection in a different flow from the one you are viewing.

Thanks for the quick response. This works.