planetmaker opened the ticket and wrote:

For rail, if monorail or electrical rail is available prior to normal rail, the tunnel building tool doesn't show the ending tile of a tunnel to be build. Upon availability of normal rail, the tunnel building tool works as expected. Attached is a newgrf where monorail and electrical rail are (I think, accidentially) available prior to normal rail; normal rail will become available in 1922.

Road tunnel building works always as expected as roads can be built even if no vehicles are available.

Tested with r17170 and r17246.

Attachments

• 2cctrainset-nightly.tar (710.00 KiB)

Reported version: trunk
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/3141