CIDP / GBS. Are recovery signs or not.

Hello Doctors, My father had chikungunya and was admitted in hospital for around 15 days. Later doctors diagonsed that he is having encephalitis due to chikungunya and later he was unable to walk properly balancing problems. He had numbness in his legs. When we discussed to Neuro surgeon he told he is having GBS or CIDP. After that IVIG course and steroids shots was given to him 2 months back. Now from some days some times he is having cramps and muscle stiffness for very short durations like 1-2 mins. Is it a sign of recovery or what because when we consult doc he told it's a sign of recovery. And in last 2 months his condition is improved after IVIG and booster shots from bed he is now able to walk with the help of Walker. Need to know whether these cramps and muscle stiffness are recovery signs or not. Regards, Gautam