I disabled the outermost atmo suit docks as they do not have oxygen, but the duplicant still places the atmo suit in the disabled dock upon passing the checkpoint.
Harold just came through the checkpoint to grab some grub and placed the atmo suit in the disabled dock:
If I'm missing something about why an atmo suit dock is disabled (ie, what the effect shoudl be), let me know.
Disable first dock next to checkpoint. Observe duplicant placing atmo suit into disabled dock.