First reason.. you loose buds...
Unless you are taking weak cuttings from the botttom of tall plants where light does not penetrate and there will be no bud loss....

How far into flowering are you?

A plant that regenerates from flowering back to veg can be very interesting. Especially if it had some small buds already forming. When you put the plant back into an 18 hour cycle each ofthe individual seed pods turns into a branch.. The plant gets bushy as fuck.. very cool if you want millions of clones.

good luck