The following train parts can be mirrored, but the mirror inverse key does not work on them:
- Wagon Loaders
- Wagon Unloaders
- Rail Loop
Steps to reproduce
- Select one of the above components
- Pressing the F key mirrors the component to the left/right of the rail
- Pressing Shift+F does nothing
Additional thoughts
I assume the root of this problem is that Mirroring rail components works differently than the rest of the game. Everywhere else mirroring a component will mirror it north/south while 'mirror inverse' mirrors the component east/west. This is a problem for players who swap the key-bindings for mirror and 'mirror inverse'.
I prefer mirroring east/west to be the default, hence why I swapped the key-binds.
I don't know if it makes more sense to make rail components work like other components and always mirror north/south and 'mirror inverse' east/west, have 'mirror inverse' reverse the direction of the track, or have it simply do the same thing as mirror specifically for rail components.