
A new Arc Raiders update has been released, fixing two exploits as well as targeting the Stella Montis "out of bounds" glitch, which enables players to stand outside of the map and shoot inwards. It's pretty careful with how it talks about the latter, however, saying that "various out of bounds map locations" on Stella Montis have been fixed. Rather than, say, all of them.
The two duplication exploits relate to items and ammo, and basically were one of those where you dropped something and then picked it up in a particular manner to get dupes. Both of these have been fixed.