There is a weird bug where some textures in the game turn to a slightly bluish grey for apparently no reason. Block updates fix it and at the same time help to spread it to random parst of your world. This appears to happen on only one side of every* block. For example a few blocks of grass in a certain area can have their -y side completly grey. This effect starts in one area upon opening my world (note that the blocks affected at the start were spruce trapdoors) updating the spread the problem to seemingly random parts of the world. There may be a patch here and there. I'm not sure if this is a problem with the lighting or textures, but I do hope that this issue gets solved.