Blast Furnace to Blast Furnace II upgrade costs three times a new build

Describe the issue
Building a new Blast Furnace II takes 135 Construction Parts III. Upgrading a normal Blast Furnace takes 405 Construction Parts III. That is three times the materials needed to build a new one.

Expected behavior
Upgrading to the next level to take less materials than building a new buildings, as established on assemblies and similar upgradable buildings.

To Reproduce
Try to upgrade a Blast Furnace into a Blast Furnace II, observe the projected cost.

Additional context

• Game version: EA 0.4.3
• I admit I haven't tried actually upgrading one to see if it's just a display issue and actually takes less materials. But it's consistent between what it tells you before upgrading and what it says it wants once you confirm the upgrade.

Attachments

I'm getting the same thing, though the amount is even worse

i'm also getting that issue but oddly not on all furnaces, some take 540 parts and some 180 parts

This is an artifact of an earlier issue - it was fixed, but not for structures which already existed when the patch was applied. those you will simply have to demolish and then build the T2 version in that place.

As the last comment mentioned, this should be fixed however entities built before the patch might still be affected.