It keeps calculating my initial score wrong if I start a new game directly from winning or losing previously.
Viewing post in Thriller's Bimbo Blackjack comments
Have explored more, and it seems to happen any time you start a new game without exiting the game first. (Changing settings might affect it, will need to test)
The last time, hitting did actually cause it to recalculate to the correct value, though this isn't an option if it incorrectly calculates you as having busted.