On custom resource packs other than the resolution 16x16, sea pickle block textures break.
The model displays completely incorrectly, and is quite annoying for creating custom packs.
This issue does not seem to affect the latest 1.5 beta, yet this bug occurs on all of the 1.4.x releases.
The images were taken on my Windows 10 PC, but I have experienced this bug on my LG V30 phone, iPad, and Android tablet as well.
The attached images are (in order) what the sea pickle looks like broken, what it should look like (i.e. the vanilla unmodified texture), and the raw image I am using that breaks the model.