When vorting out of any colony (didnt test them ALL but did try on Andro, Pax, Brooklyn, Aurelia & Ceres Delta) IF you have a consumable item assigned to any of the 4, 5 ,6 ,7 hotkeys upon vorting into your destination the previously assigned hotkeys will now be unassigned AND for each hotkeyed item you will lose 1X from your item stack in your inventory. This occurs for both regular and FP marked items and also drugs. The weapon slots / weapons on slots 1, 2, 3 remain assigned and are not deleted. Ammunition in inventory remains and it NOT deleted. This seems to be directly linked to assigning items to slots 4, 5 ,6 or 7.
Happens to me too.