I recently started using some rockets from the website, I found that sometimes the throttle locks up at 100%, not being able to change it. The only way I can fix this is to re-download sr2, but it is not a full fix.
I also have an issue where the control 'crosshair' dissapears, making the rocket extremely hard to control.
It’s called solid rocket boosters you can’t control them, only liquid and xenon can be controlled