Prismarine animation doesn't fade correctly

I was building with Prismarine (just the regular variant) in Creative Mode and noticed that the cracks in the texture faded from green to another shade but then immediately changed to blue without any fade transition. Then blue faded to another shade and then that immediately changed to purple, and the cycle repeated. I know from playing on the Java version that Prismarine's animation is supposed to be a lot more gradual and smooth, and it doesn't seem right that every other color changes so jarringly.