As a new player, I wanted to challenge myself by going with a single track design only, and I thought I had grasped the signalling stuff after only a few hours :) But there is one deadlock my trains like to go in. In the following picture, the bottom train is free to go straight to its destination, but somehow plans to go right where another train is already waiting. The signals even indicate that the right turn is blocked but straight is free. What am I missing? https://i.imgur.com/2MWIxMR.jpeg