I have a steam version.
When designing troops autoupgradable weapons disappear - unit has no weapon in hand and 0 attack.
Auto option gives information that there is no compatibile weapon. The custom unit is hidden in the training tab until enchanted weapons are researched.
It does not apply to all races (Ironeers work normally, but Resoln or Warlord Verga are bugged). Blunt weapons seems to work normally.
I noticed that it affects one-handed cutting weapons and spear weapons.
Units designed manually do not have upgrade weapons button - but the upgrade armour button is present.
Is there any solution to this?