I have a problem where the TT-70 decoupler starts to heat up and finally explodes at 2000 degrees. Although it could be that the actual heat source is the Jumbo-64 fuel tank it's attached to. What makes this interesting that this happens even without liftoff. The heating up starts almost immediately after spawning at launch pad, and after about 2 minutes the decoupler blows up. Same result always whether I launch the vehicle or not. EDIT. Oh well it seems that a dozen of radiator panels dissipated just enough heat from the fuel tank for me to reach the upper stage. Strange behavior anyway.
