MertMe

I think I figured out why this happens. I tried 0 dampening thing but didn't work. What happens is that when I undocked hinge that connected to piston and docking port on my main craft comes off even with unbreakable joints. I think before docking port undocks it breaks and since there is no vehicle connected it can't undock and the vehicle is put into purgatory. I tried disassembling parts with a kerbal setting gravity to zero and assembling again but again same, still comes off. I believe the problem is this but might be wrong. I will use top port for this one since it works, but going to be careful on next craft.

Normal docking port still doesn't work, they merge after undocking. However, thankfully I had added Jr. Docking port at top which separates properly. My guess that it must be something to do with normal docking port. Also Normal Docking Port separated properly when I tried small rover. I don't know why it doesn't work with main vehicle.

I have the save just before two vehicles docked. I tried docking maybe 15 times and the result is still same. I have to add that when I undock, hinge on my main craft breaks away from it, probaby because of slope and pistons create tension. When I tested on Kerbin, there was no problem. I also have save file before I launched refuel station.

Hi everyone, my problem is about stages merging after undocking. I landed on Mun and run out of fuel. I sent refuel station with normal Docking Port connected to hinge and pistons so I can manuever docking port independently much like an arm. I got crafts closer, and docked. Transfered the fuel and everything is fine upto this point. When I undocked I saw that I can no longer control my main craft, it doesn't have a name and even though two crafts undocked I can control both simultaneously like it is a single craft, stages got merged and can't get crafts separated. Is this a bug or am I doing something wrong. ( I don't want to send a capsule to get my crew back, I want that particular craft back for challenge) TLDR: I docked with normal Docking Port that is connected to pistons and hinges, transfered fuel, undocked and crafts and stages got merged even after undocking. Any ideas? Thanks in advance.