The colors on the ring of the top of the logs doesn't match the colors on the side of the log

For oak the ring is darker

For spruce it is lighter

For acacia some pixels are darker

For jungle it uses the same color palette but uses the colors that are too different from each other

While birch isn't pictured some of the pixels are slightly discolored

No clue how far back this goes, it likely goes back to 1.14