If it is a logo sticker I would agree.
Back in the 90s I bought a new Huebler cue. It had a square sticker in the same place that just had the model number and price on it. I took it off right after buying it and cleaned off any residue. As the years went by, the buttcap yellowed a bit but like in the posted picture, where the sticker had been it is still white! You'd think that would be the case if you had left the sticker on it for a very long time and everything around it faded or yellowed but not when the sticker came off right away and it looked fine then! Weird!