In the case of a training interruption due to sickness, injury, or vacation, our current recommended course of action is to keep your plan intact and leave your skipped weeks as “skipped” in your Calendar.
Then, on the week when you are jumping back into the plan, select the -1 versions of each workout to allow you to more comfortably ramp back into training. “-” versions of a workout typically decrease the duration and the number of intervals prescribed in the workout, which lowers your weekly TSS as you’re getting back into the swing of things. You can learn more about alternate workout versions here.
If a workout does not have an alternate workout version, or if the “-” version is still slightly too difficult, we recommend decreasing the intensity to between 90-95% so that the workouts feel tough but manageable.
I know this is not an ideal solution, but we are working to program more complex logic into Plan Builder so that eventually we can to handle all this for you. In the meantime, this is our recommended course of action for keeping you on track for your events.