[SWHouston]

Fortunately neither of mine have "rolled" down stairs.

But, I'd think that reluctance to descent would be more apt to occur
when there is a puppy, or a Dog moving into an environment, where it
had not encountered stairs before.

Both of mine took to the 'going up" REAL good, and would do a step
at a time coming down (little hesitations on each step).
But now !, it's one paw per step on the down, specially when there's
a reason. (treats/call to go outside/an arrival of someone)

There was a little training process though...
Both would get "stuck" midway at times when they were young.
We would move up toward them part way, leaving a few steps
between us and one, and encourage it to descend on it's own
just a few steps at a time. Then increase the distance slowly.