
One thing I've found in the last Patch is, I get train collisions for no obvious reason, almost always involving a PBS signal somewhere. Now, the thing is, there doesn't appear to be any particular cause, like a screwy signalling setup. And the collisions are quite rare, I go for years without one, then I'll have two in a row, then a long time without one, etc.
This could be considered a bug of some sort, and it probably is, but given that the collisions are rare, it actually seems to me more like a feature. I mean, IRL there are occasional accidents, no matter how careful the railroad is. Of course, if there's bad track design, they will be more frequent, but even with everything as it should be, Murphy's still around.
So I kind of like it the way it is, it's an additional challenge, just like on a real railroad.