Additional to the new atmo/lead suit issue from latest patch there is also an issue of dupes not returning their suits after passing a checkpoint.
These two checkpoints are "Vacancy only". The workaround for the idle issue are manual generator with a timer sensor of an 1s red 1s green setting to lure the dupes away from the checkpoints.
May I humbly suggest to roll back the latest patch? With this issues the game is unplayable.
Also with the issue of dupes idling at the checkpoint I found this in the log file
[11:25:43.088]  [WARNING] Mi-Ma is already in the process of changing equipment (equip)
I made a video for this too. But than I saw that this bug was already reported. Maybe the log helps.