Factorio Forums

Posted: **Mon Jun 01, 2026 12:17 pm**

Demonstration: https://www.twitch.tv/zaspar_/clip/Bumb ... ALB-5-NvBw

Expectation: both the entrance and exit underground should automatically be built
Result: only the entrance got built.

Replay: https://drive.google.com/file/d/1uE9N38 ... sp=sharing

Posted: **Sun Jun 21, 2026 5:15 pm**

Hi i managed to reproduce the bug, on the clip we can see that it placed the underground but since you move your cursor back over the underground belt it got deleted and replaced by a belt.
I do not know if this is really a bug, a condition could be added if you are still draging since the underground belt has been placed do not remove it

Factorio Forums

[Kovarex] [2.0.77] Underground exit doesn't get placed when dragging over a perpendicular belt

[Kovarex] [2.0.77] Underground exit doesn't get placed when dragging over a perpendicular belt

Re: [2.0.77] Underground exit doesn't get placed when dragging over a perpendicular belt