Huh, that sounds like not a huge percentage :)
With "what percentage" I meant that starting games with completely random layout, over a long time, assuming an ideal player, what percentage would be solved. So far for you it looks like this would be ~0.25% (1 solved out of 400 games assuming 1 game played / day).
Played Spider Solitaire with 4 suits? This game seems quite similar to that (10 piles, 2 decks, same card placement rules), in a different arrangement, with more cards revealed, however since all are laid down at the start, there are no opportunities to build before taking on more cards 10 at a time.
Got a decent run today, but... There weren't many options left there!
I maybe found a bug, not sure about it though as I only got surprised by the effect. I think I had an ace of hearts under a king of hearts onto which I stacked up hearts. When dragging in the '2', it was gone, leaving the other ace of hearts I was planning to put atop there for me, killing the run.