Thanks for the effort.
I removed all train signals, made a save and loaded it into the latest version.
From there I just rebuild some tracks to avoid that signaling again.
I just couldn't wait

But another bug gone, up to 1.0

I can't load the game in this release.
When I turn back to .49 it works perfectly fine.
I also did make a new save in .49 but still no result.

That's bad! I have also a drop of FPS from 60/60 to 20/60.
Not only in overview mode but also on food.
I'm using a GTX1080 on Intel I7 6700 CPU@3.40Ghz that should not be the problem.
until now it was always 60/60 (the previous version before this one, also dropped sometimes)

The Oil Refinery from coal to oil changed the input Oil<->steam
It's not in the change-log, so, I think it a mistake?