Live tables need an auto-decision policy. Duel's is published, and it is bad on purpose of simplicity, not because the maths is hard.
On a timeout the game hits 11 or less and stands on 12 or more. It will not double. It will not split. It will stand a 12 against a 9, a 10, or an ace. That is not basic strategy. It is a two-rule robot. The same robot finishes the hand if you drop from the stream.
The cost of that policy is not in the published RTP, which assumes a player who acts. It is in the tail of real sessions: mobile networks, browser locks, a second table left open. One stood 12 against a ten, or one unsplit pair of eights, wipes a long run of correct plays.
I treat this as an operational risk, the way I treat a land pit that will call a hand dead if you leave the rail. The fix is not a different strategy chart. The fix is not relying on the auto-player for any box you care about.
Duel Blackjack Pays is explicit that neither the timeout policy nor the disconnect finish is basic strategy. That sentence should be in every live-table re
