[Bug]: Signals do not work

[Roovy22]

Version of OpenTTD

0.63.0, linux mint

Expected result

When the signals are programmed to not make train from a specific company pass trough a specific section the train of other companies should not be affected by the programmation.

Actual result

The train from other companies aren't allowed to pass trough the section.

Steps to reproduce

1. Joined a multiplayer server; 2. Make some tracks for infrastructure sharing; 3. Programming the signal; 4. The train do not pass trough the section.

[JGRennison]

Any chance you could post the savegame for this?