[2.0.62] No train route preview on map when traveling in cargo wagon

[sben]

I noticed for a long time that sometimes when traveling with trains, no route preview is showed on the map - although it is mostly.
Now I discovered that this is only happens when traveling inside cargo wagons instead of locomotives - even backwards facing, inactive locomotives show train preview.

[Rseding91]

Thanks for the report. This is now fixed for the next release.