I always say that continuity of awareness is important. But you shouldn’t force it to happen. If you use force, it means that there is craving and the practice then becomes difficult.
It is impossible to maintain continuity of awareness for most yogis. It is normal for awareness to be on and off, on and off (remember that).
If the yogi uses force to maintain awareness, she exerts too much energy and gets tired easily (or becomes like a zombie).
Just try to be aware as much as you can; when awareness is lost, start again, again, and again. Be patient and practice.