continuity errors when they are made aware that there is not a script supervisor to rely on.
Make sure the dialogue in the script is being said the same by actors each take. This has nothing to do with tone or delivery. This has to do with what lines are written on the page. Sure, some scripts better lend themselves to actors improvising dialogue during takes or were written so actors could ad-lib.
Other times a first time filmmaker can feel overwhelmed when actors do not deliver their lines the way they are scripted. I have worked with actors that have suggested line changes that were awesome and included in the script. Other times an actor might say a line kind of the same. “Kind of the same” can drive a director and editor crazy in post production when they are trying to keep dialogue continuity. Having actors stick to the script keeps filming running