Did you dump all the riced batter in a crock pot and cook it? That is really not rebatching. Rebatching is taking fully setup soap, grating and remelting. I have an fo that seperates and rices badly, my procedure is to sb then let it sit awhile and see if it re-separates. If it does I stick blend the heck out of it, if it still refuses to come together, I put a lid on it and let it sit until it start to heat up and gel then sb it well again. If all that fails in goes into the crock to cook. Usually persistent stick blending will get it together. Mine will take up to 30 min to come together, and I have never had it not come together with stick blending and cooking
Rose and many other floral fo's are notorious for ricing and seizing. Sorry you are having trouble, but be persistent and you may not have to dump it. Ricing fo's are hateful