Fuel in the stage has the right amount left but each of the tanks shows 100% fuel inside. Also craft mass has the same value as before launch and the TWR doesn't seem to change with time (only with altitude due to the Isp increase).
I'm not sure if this has to do with how I connected the parts, the style change... I've managed to fix the burn time but I can't figure out how to make the craft work.
@AndrewGarrison The game version of the sandbox is 0.7.3.4 iirc