When you unlink items with script, using llBreakLink(), the unlinked item will often flicker, dissapear or is only visible from a certain angle, and the item cannot be interacted with until you cam away far enough and back or TP away and back, or you wait long enough till the sim sends an update to viewer. Also area search is failing to find the items if its more then one. it will only find one. When you unlink items manually it works fine. I tested it on several viewers, as well as the latest LL viewer, I tried different sims and asked many peopel if they see the same as I do . The script can still see and find the items fine, so it looks like it was simply forgotten to update the viewer after the operation, like what does happen when you unlink manually or rez items.