cloning a plant that was already or is still flowering?

[Racerx]

for what reason is it harder to survive compared to a veg clone. also another question if it flowereing and budding per say it can be put back in veg state?

Its a different life cycle. Plants cannot just revert back instantly, its a slow process. Your confusing the plant and stressing it in a period where most of its food is devoted towards developing flowers instead of roots and vegetative growth. I have seen it done, but it took over a month. I find it easier to obtain a new clone and grow it instead of regenerating a flowered plant or reverting back to veg from flower.