Cool, movement again.
That's one read of what was going on...
I'm personally chalking it up to more a hesitancy among the ranks of basic infantry that the vanilla (unempowered) Elder signs are like the Third Reich rolling up and encountering keep off the lawn signs in German.
Enough knowledge to show we're not entirely unaware of Mist creature lore, make them wonder if the had enough time to print
these 'What else' might we have on tap?!?
Respected Elder's bringing up the rear, bolster the unease allowing them to push past the uncertainty, back into action.
Momentum is important with armed forces. Historically if a force stalls, it takes a lot of effort to begin their forward movement again... Tanks reinforcing stalled infantry, reinforcements arriving, etc.