At some occasions, with more complicated platforms with a single-track layout, the trains appear to not stop for signals that are red, and ignore them (or not ignore them, they simply don't seem to register one another), and proceed instead at 1km/h. This happens with both absolute block and track circuit block; clearly something is amiss with the signalling code's handling of reservations.
The setup depicted is an example where this occurs:
(https://i.imgur.com/m2X06KV.png)
This is probably a duplicate of this bug report (https://forum.simutrans.com/index.php/topic,21458.msg199535.html#msg199535), though it is really helpful to have an example layout where this is known to occur.
In the other thread, James requested a save game, so if you have a savegame compatible with the current Nightlies then that might help him to debug this.
Yes, thank you - if you do have a saved game in which this bug can reliably be reproduced, please do upload it somewhere. That would be very helpful.
Testing map:
https://mega.nz/file/hGJzXbxI#pwMmidSxtGZmBP4eUqikQTBp588H2OaY2ALq8w9j9T8
Thank you for the report and saved game. I believe that I have now fixed this; I should be grateful if you could re-test with the next nightly build.
So far it appears to be solved.
Excellent, thank you for confirming.