Hi, BIS!
I was hoping this would finally be fixed after update 2.22, as there were fixes related to the dead player's inventory, but my hopes were dashed once again.
This issue has been around in Arma 3 for a long time, and I see it ONLY on CDLC maps (Prarie Fire and Western Sahara), specifically, the dead player's rifles start jumping around. Please note: This probably occurs on all CDLC maps, but I don't have all CDLCs. I've never encountered these issues on other maps, even modded ones. These are likely CDLC-related issues.
Here's an examples:
this is V2.22
https://youtu.be/z2MKyTfmsR8
this is V2.20
https://youtu.be/6Njp6foVWa4
https://www.youtube.com/watch?v=Wsj0CDdjAOE
This doesn't happen consistently, but it happens every time in certain areas of the map. I hope you'll finally fix this issue, as these CDLC maps are official and paid.