Hello, I encountered an issue with KSP 1.1.2 (running on Windows, tried both 32 and 64 bit) in which if I attach two docking ports in VAB, there won't be an Undock option during a mission. If I choose the Decouple Node option, then the ports will be still stuck together, despite game showing there being two separate spacecrafts. If I then go to the Space Center and back to the vessels they'll either dock and after that ports will have the Undock option, or there will be lots of uncontrollable spinning and exploding. At first I thought it may be because of mods that I have installed, but I was able to reproduce the issue on a clean install with a new save. I'm wondering if I'm doing something wrong, or is it a bug, because IIRC I created vessels this way pre-1.0 and they worked as intended.
Craft 1 Craft 2