https://i.imgur.com/TQhIHRC.png

Both sides were placed with the same track blueprint with the same settings, the left half was placed leftways (counterclockwise) and the right half was placed rightways (clockwise).

Tested on 1.2.0

+1
See how different seems 30m 22.5 deg. turn depending on its direction.

Also left oriented turn is thinner than right turn.
Rail blocks on the left turn:



Similar position on the right turn:



Can it be any radius bug which counts different radius for each direction?

Thanks for the detailed report. Some other users complained about this and I found a solution a day or so ago. I'll be doing a release in the next few hours to address this.

In the mean time you can try the latest dev build which should fix it: http://174.138.127.16/job/Immersive%20Railroading/202/artifact/build/libs/ImmersiveRailroading-1.2.0_1.12-202.jar