If the first move Hisako uses after any opener is a delayed auto-double, the opponent cannot get a timing lockout in the gap between hits. This does not apply if you go opener → linker → delayed auto, or if you don’t delay the first auto but delay one later in your combo. Has to be the auto-double used directly after an opener.
Tested on both Steam and UWP/Win10 versions of KI, with multiple characters, as well as with all of Hisako’s openers.