Error when changing filament in right struder printing in single 2 mode

If I print in single 2 mode (using only the right struder) and the filament ends, the struder, instead of returning “home” (moving to the right), it moves to the left until collides with the left struder.
After this collision the right struder is not alligned anymore with the current printing, so I had to cancell the printing loosing hours of work… it looks like something is not well programmed in the firmware.
Workaround… don’t print large works using single 2