you may have damaged vascular tissue.
if it's healed in meantime in a way you can't smush it back together, just have to wait and see... it will either recover or those limbs will be dead husks... or they may be dead husks until it heals lol...
whether or not you put the effort in depends on a lot of factors and personal preferences... i mean if you have the sapce and it doesn'st in any way hurt you.. might as well wait and see.. if you can replace it with a plant at same maturity, i'd do that because it eliminates risk and ensures properly filled space under the light onthe same timeframe.
in meantime what vascular tissue that remains doesn't seem to be enough to maintain that branch, currently.