I have several bags of Moxis that discolored very noticeably. Is seems like the chartreuse tails on the firecracker/chartreuse or purple/chartreuse fade pretty quickly even when kept in unopened bags and out of sunlight or excessive heat. The Pro-Blue seems color stable.
I’ve started storing them in my freezer and only keeping what I need for the short term in the boat. Hopefully in the dark freezer, this will prevent the discoloration.
It doesn’t seem like some other brands such as Kalins discolor as quickly, if at all. I’ve got some various plastics that are several years old and have not shown any noticeable discoloration. Perhaps those manufacturers are using different plastics and/or stabilizers.