Trucks not able to dump in a dumping zone close to world border

Issue description

Tho, one can make a dumping zone (,which has worked flaswlessy the hole time), trucks refuse to dump close to the (nearly invisble) world border. Map: Curland. Trucks give notice: 'searching for valid terrain designation'

Expected behavior

trucks continue dumping until map border

Game version

v.0.4.8

Attachments

firsttry26a.save

Files not imported: firsttry26a.save

Didn't check the save, but probably a duplicate of Trucks refuses to dump rock near map end

Yes. I posted elsewhere about the Curland Map. The borders are broken on the corners of the map. Bug Dock seemingly blocked by invisible wall, but not edge of map.

Duplicate of Trucks refuses to dump rock near map end