invalid-signal-position-turned-valid.png (213.98 KiB) Viewed 466 times
This is minor issue - when signals are separated by 2 empty tiles, it should be not possible to put signals 1 tile in each direction on both sides. However placing signal on opposite side creates spot where signal can be placed that violates this restriction
Other special use case that should not be possible:
invalid-signal-position-turned-valid-2.png (197.67 KiB) Viewed 466 times