Default texture minecraft:entity/conduit/open_eye causing mipmap to drop from 4 to 3

The minecraft:entity/conduit/open_eye texture in the default resource pack is size 8x8 and has been causing anyone with mipmap settings set to 4 to be dropped to 3.

Error messages in log:

Texture minecraft:entity/conduit/open_eye with size 8x8 limits mip level from 4 to 3
textures: dropping miplevel from 4 to 3, because of minimum power of two: 8