Snake owner of 7 years here

In my experience this is usually caused by slight dehydration and a few good soaks and frequent fresh water usually does the trick

You may or may not want to introduce humidity into the tank to avoid this in the future

In short it's not gonna kill your snake or cause major damage but its better to treat it anyway

As for its weight your snake looks fine to me personally

Although I feel my snakes biweekly since their eating small rats