When copying a selection that has belts going across the border of the selection, and the belt is connected to another building/splitter on the outside, after copying the connection point on the inside is broken and can not be connected to.
Steps to reproduce:
1) Place a splitter/building
2) place another splitter/building a little bit away
3) connect them with a belt
4) make a selection that includes 1 splitter/building, but not the other. Make sure the selection crosses the belt
5) Copy the selection
6) You will see that the connection on the splitter/building that used to have the belt is now broken in the copied part. You are unable to connect a belt to it anymore.
When copying a selection that has belts going across the border of the selection, and the belt is connected to another building/splitter on the outside, after copying the connection point on the inside is broken and can not be connected to.
Steps to reproduce: 1) Place a splitter/building 2) place another splitter/building a little bit away 3) connect them with a belt 4) make a selection that includes 1 splitter/building, but not the other. Make sure the selection crosses the belt 5) Copy the selection 6) You will see that the connection on the splitter/building that used to have the belt is now broken in the copied part. You are unable to connect a belt to it anymore.
Short video showing the issue: https://www.youtube.com/watch?v=NiQU6GJ7nH0