Yeah the loot marker will remain sometimes a few minutes after the actual body disappears. If you’re ever unsure again just check the event log and it will tell you if your items got lost. I can’t recall the exact time you have to go to it but I’m going to guess somewhere between 10-15 minutes. I know if you’re all the way across the map (on either map) you have zero chance of getting the body, unless you teleport.
Ah right, it was definitely more than 15 minutes while the xbox updated itself then, so yeah, this is the solution, many thanks. I was confused by the death/loot marker persisting on the map. Cheers.