See title. When ever i upgrade a guard tower, it deletes the bows, swords and armour off of my soldiers/guards that are manning it. The bows are easy enough to replace because it's just wood, but early game melee weapons are pretty expensive to be replacing for something this silly. At least if they died in combat someone could just come loot the corpse, but this literally sends their equipment to the shadow realm for some reason.

If i want to avoid this i have to retire the guards, who will store the equipment, then upgrade the tower, then re-man them. Which is tedious, arbitrary micro management.