[2.0.33] Smart Belt Dragging completes underground section but removes existing surface belt

[travvo]

I had a belt that meandered between two lanes because of placement of regular splitters (on a spaceship originally, space constrained). I went to add a second belt in the lower row, using the smart belt drag, and while it successfully put an underground section to build the lower belt, it removed one of the tiles of the pre-existing surface belt. I would expect this tile wouldn't be removed:

20250205133241_1.jpg (908.72 KiB) Viewed 591 times

By contrast, the belt dragging on the right was all accomplished without removing surface belts.

Log:

factorio-current.log

(12.91 KiB) Downloaded 27 times

Save (new start with /editor):

Belt_Test.zip

(1.31 MiB) Downloaded 21 times