Ah, thank you. I understand the original problem now! I was struggling to picture where the confusion was coming from.
I guess I see why Larian increase the size of the gauge rather than refilling it, given it’s possible that Dash and Cunning Dash are used before the character moves. Well, or I suppose it could be redesigned to have separate gauges but that might get messy.
But yes, clearer tooltips would, as always, help for a start.