If you make a rail crossing, and then put a rail next to the crossing block, the rail will not switch if powered by redstone. See video: https://youtu.be/ChkBLAib34A
Linked issues
duplicates 1
Comments 3
Dupe of MC-8634
This is NOT a dupe of issue 8634. In the other issue, there are 4 rails connecting to one junction - it makes sense that the junction rail would not change when powered.
In this case, there is a parallel rail running alongside the junction. The junction itself ceases to work, when there is no reason that it should break.
I can confirm that this issue affects both 1.9.4 and 1.10.