Knowing my own dreams, I realize that the ones I get in the early hours of sleep tend to be more abstract and without much of the sensations and objects and situations that we experience in real waking life. Some of those dreams after I recall them seem to be just a period of deep hynogogia with images and sounds, but not much form and my mind tends to mull about abstract illogical ideas that are hard to put into words after I wake up and try to record my dream.
But even the most vivid non-lucid dreams I get, which tend to happen in the early hours of the morning and end of sleep cycle, they always have a moment of drastic, and seemingly abrupt change. One moment I was concerned about something inside my house and then I remember being outside climbing trees or whatever. I remember both and know they happened chronologically one just before the other, and yet, what happened in between? I have no recollection of leaving the house.
Perhaps there is a moment of abstract imagery and thought that occurs for a period between them and who knows with certainty how long it ACTUALLY was. Although the two moments seemed like they occurred within seconds of each other, there may have been a whole 5 minute gap between the two and we only THINK that it was just a short period between the memorable dreaming. That is possible because without any memories to fill in that 5 minute gap it would seem like it never existed after we wake up and recall our dreams. I actually disagree and think that a 5 minute gap would change the dream so completely I would know that it was a different dream, but then again.... how can I truly be certain of time when there is no thoughts to remember in that time frame?
<-- my head just exploded again.......
But to bring this back to the original topic, if this can happen in a non-lucid dream, there is no reason why it won't happen when lucid. But since we are aware during that break, we instantly create another scenario and don't enter a 'timeless' phase.