Train won't unload into empty depots

Issue description

See this video for description of problem: https://streamable.com/17bi1t

The train is stopped at full depots and but there are empty ones at this station that it could move up to unload.

Reproduction steps

I've attached the save file.

Game version and build number

v0.7.5a

Operating system

Linux

Attachments

coppertrain.save

Files not imported: coppertrain.save

This works as intended, trains won't consider fullness of station modules for unloading.