So a buddy of mine has a theory that it might be due to a weird bit of code (that may be fat fingered in for all we know) that decides who gets to loot what. In Singleplayer that would be the main player. The first entity the game creates in the database.
For multiplayer, its different because the server is setup and launched before the first player enters. Which means they are NOT the first entity the server creates.
It doesn’t make sense why that matters, but it does explain the situation a bit.
But as it stands now, no tool, not even normal ones work on humans. Weirdly enough Ymir axes don’t work either as I tested those yesterday. The weird part about Ymir axes is they get their resource from trees. I get wood, branches, and resin (depending on tree) but no shards.