i cant orbit my spacecraft in space, because the engine will stop if you change in another craft.im usually reuse the first stage of my rocket,i leave my second stage in full throttle and i back in first stage after i land my first stage my second stage is crashed because the throttle will off if you leave it. Please fix this next update
If you change to another craft the engine won't stop, but it will stop if the craft is unloaded, which happens when you are far enough away. You can change that distance by manually editing the game files, but I wouldn't recommend that, since your performance will become worst and the game may crash.