The stamina of armor is for walking and running only.
Here is the xml for armorIronHelmet:
<passive_effect name="StaminaChangeOT" operation="perc_add" value="-.045" tags="walking"/>
<passive_effect name="StaminaChangeOT" operation="perc_add" value="-.09" tags="running"/>
Missing output_log.txt
Missing GenerationInfo.txt
Missing map_info.xml
Can't repro since seed name is not known. F3 info in video not producing the same generated world name.
Correct. The exported prefabs are not saved in the prefabs folder. I'll ask Alloc if that can be changed. In the meantime, you can always copy paste the exported prefab to your prefabs folder.