From what I gather online(don't know if it is all that credible but makes sense), the concept of fat storage during starvation period comes from the fact that metabolism of the body drops. Say going on a caloric deficit of 50% does not equate to a metabolism drop of 50% i.e <50% So overall there is still a caloric deficit for weight loss.
Also, starvation does not occur from just a few days of extreme caloric restriction(if any). So lets just consider our intermittent fasting to be semi-starvation.
What must be made clear before we move on is that for weight loss, regardless of whether it being a conventional diet or lchf, there must be a caloric deficit in our diet in order to lose weight.
In a conventional diet, short term semi-starvation would yield a weight loss but long term semi-starvation would not be beneficial as research shows the test subjects to have unsatiable hunger and almost never feeling full, thus overeating(caloric surplus) and putting back on what they have lost and more.
Everything up till this point is from
The Starvation Mode Myth...again. | MyFitnessPal.com
However, because this is a LCHF diet, both short term and long term semi-starvation would yield positive results as we are not subjected to the blood sugar spike and crash(which often results in hunger). Also, fats are able keep us in a satiated state for extended period thus we would not overeat.
Therefore in conclusion intermittent fasting(semi-starvation) is actually beneficial in a lchf diet.