Factorio Forums

What did I do?

• I tried to place a blueprint containing belts over an area that required an underground connection using "Super Force Build" (Ctrl + Shift + Click).

What happened?

• When hovering the blueprint, the game correctly visualized a suggested underground belt connection (the ghost appeared connecting the belts to bypass the obstacle). However, when I executed the Force Build (Ctrl + Shift + Click), the blueprint was placed but the suggested underground belt was NOT placed, leaving the connection incomplete.

What did I expect to happen?

• Since the game explicitly suggested the underground belt visually during the hover phase, the Force Build action should have placed that underground belt to complete the connection, just as the visual ghost implied.

Does it happen always, once, or sometimes?

• It is reproducible when forcing a blueprint over an obstacle that triggers the underground belt suggestion.

Can you reproduce this without mods?

From the video and from the log i am going to claim that this is an issue caused by ConstructionPlannerContinued ("Construction Approvals") mod where it is listening for build events and changing force of those entities into "unapproved" one, and by doing this it causes interference with game itself. If you cannot reproduce this issue without this mod then i will consider this to be Not (our) bug.

Preview does not notify mods what is going to happen so preview is unaffected, but when blueprint is placed, mods get a chance to change the world and break super force building.

• I have successfully reproduced this behavior in a Sandbox game. The core issue is the misleading visual feedback: when hovering the Blueprint, the game explicitly shows a ghost suggesting an underground belt connection. However, when I execute the Force Build, that suggestion is ignored and the underground belt is not placed. Please refer to the attached video demonstrating this reproduction.

(Apologies if some terms are unclear, I am using a translator. )