I've found a bug. When I died cause of no Oxygene, I respawn on structure (on a research lab and on a water provider for my base). The structure appared on my inventory but they are still place on the map, so they are duplicated.
I died somewhere in the map (not on the base). When I respawn, I between a research station and a base water provider. I cannot walk and I have break the two item. After that, I've 2 water provider (one I've break from the map an other I've when I respawn) and 2 Reasearch station (same explication)