I'm running a 1000+ day colony but the problem isn't new at all.
My colony is basically full of carbon so i made exosuit for my dups to leave in all the time. I Try to always have 8 exosuit ( 2 for each dups)
"Try" because sometime my suits just disapear for apparently no reasons. Sometime they drop it on the floor so i can take them back but so far i've lost about 20 of them.
My docks are basically a room they need to go to change suit so they can go in from left or the right. I sometime have trouble with them changing suits repeatedly when they don't have much to do from time to time so that may be it.
Can't say much more, i really don't know where they can be and i don't think they can break so yeah.
Hope to hear from you later.
Steps to Reproduce
Have exosuit on dups, a two entry exosuit-dock-room and an unbreathable base environment.
This issue has not been confirmed by a developer yet.