I have experienced it in snakes without any of the morphs known for it, but it's never been terribly severe, and in my personal experience can always be linked to a stressor of some kind (spider or not). Has something changed in her environment lately, new enclosure, temp change, more people traffic around her enclosure? At 5 years, it seems an odd time for it to suddenly get worse out of nowhere. It could be a sign something is wrong that isn't readily apparent yet, like an infection or tumor, since reptiles are so good at hiding being sick. If it were me, I'd double check her husbandry is on point, look through her records and see if any weird patterns have been happening, and give her a good once over to make sure I'm not missing an illness.

Even though spider is the one everybody hears about, it's also common in woma, hidden gene woma, sable, and champagne.