hi! congratulations on your first LD! I think you just subconsciously thought you might loose lucidity or that dreaming is hard so your imagination made the static. The harder you would have thought it would be getting rid of the static the more there would have been, with practice if this were ever to recur just assume that "getting rid of it is very easy" and it should go away, but since it's just the first LD chances are you won't see any static at all in the next dreams.

I've had similar experiences sometimes with false awakenings- either my eyesight would be "damaged" or something like that, or I would be drunk, but as soon as I forgot about those things and instead shifted my focus to doing something else the last time I had it it went away. Keep practicing!